Official Raspberry Pi Model 1 B+

Official Raspberry Pi 4 Model B 4GB RAM The Raspberry Pi 4 Model B 4GB is a compact and versatile single-board computer that provides desktop-level performance in a credit card-sized device. The RPI 4B is powered by a Broadcom Quad-Core Cortex-A72 (ARM v8) 64-bit SoC that runs at 1.5GHz and has 4GB of LPDDR4-3200 SDRAM for efficient multitasking and basic desktop programs. This device is designed for a wide range of DIY projects, including media centres, file servers, robotics, and smart home systems. The Raspberry Pi 4B 4GB supports dual 4K displays ( 4K@30Hz ) through its micro-HDMI ports, making it perfect for high-definition video and creative endeavours. It has dual-band WiFi 2.4 GHz and 5.0 GHz IEEE 802.11ac , Bluetooth 5.0 , and Gigabit Ethernet for a consistent connection. It also features two USB 3.0 connections and two USB 2.0 ports to connect devices. The Raspberry Pi 4 4GB is popular among programmers and makers. It comes with native Python support , making it a fantastic platform for coding education and automation project development. It is capable of running both 32-bit and 64-bit operating systems , offering versatility for different uses. Whether for teaching, prototyping, or creative projects, it serves as a potent and affordable computing option. Shop Raspberry Pi 4 4GB Full Kit – Plug & Play Setup Affordable power for your projects – Raspberry Pi 4 2GB ! What makes this model Great? The speed and performance of the new Raspberry Pi 4 4GB are a noticeable improvement from earlier models. For the first time, the Raspberry Pi Foundation has created a complete desktop experience. Whether you're editing documents, browsing the web with multiple tabs open, managing spreadsheets, or creating a presentation, you'll find the experience smooth and familiar. It is a more energy-efficient and cost-effective machine. Features Broadcom 2711 Quad-Core Cortex A72 @ 1.5GHz delivers 20% faster performance with improved power and thermal efficiency. Dual micro-HDMI outputs support dual 4K displays with hardware video decode at 4Kp60 (H.265, H.264, MPEG-4). Dual-band WiFi (802.11b/g/n/ac) on 2.4GHz & 5GHz with advanced PCB antenna for robust wireless connectivity. Bluetooth 5.0 offers an extended range of wireless peripherals. Upgraded USB 3.0 Ethernet provides wired speeds up to 10x faster than previous models. 2 USB 3.0 and 2 USB 2.0 ports enable versatile peripheral connections. 40-pin GPIO header is fully backwards-compatible with earlier Pi models. Optional PoE support is available, with PoE header pins designed to work with proper standoffs. Comparison Table Raspberry Pi 4 Model B Raspberry Pi 5 Raspberry Pi 3 Model B+ Price (INR) ?3599 VIEW ?5129 VIEW ?3649 VIEW Processor 1.5GHz Quad-Core ARM Cortex-A72 2.4GHz Quad-Core ARM Cortex-A76 1.4GHz Quad-Core ARM Cortex-A53 RAM 1GB, 2GB, 4GB, 8GB LPDDR4 2GB, 4GB, 8GB, 16GB LPDDR4 1GB LPDDR2 Wi-Fi Dual-band 802.11ac Dual-band 802.11ac Dual-band 802.11ac Bluetooth 5.0 5.0 4.2 USB Ports 2× USB 3.0, 2× USB 2.0 2× USB 3.0, 1× USB 2.0 4× USB 2.0 Ethernet Gigabit Ethernet Gigabit Ethernet Gigabit Ethernet Video Output 2× Micro HDMI (4Kp60) 2× Micro HDMI (4Kp60) 1× HDMI (1080p) GPIO Pins 40 40 40 Storage MicroSD (SDXC up to 2TB) MicroSD (SDXC up to 2TB) MicroSD (SDHC) Power Supply USB-C USB-C Micro USB Click for Complete Raspberry Pi Kits – Learn, Build, and Innovate! Pin Diagram:

SmartElex 10D DC Motor Driver HAT for Raspberry Pi | PWM Driver HAT with PWM Speed Control The SmartElex 10D DC Motor Driver HAT is a compact and reliable expansion board designed specifically for Raspberry Pi to control DC motors with precise speed control. It helps users drive motors directly from the Raspberry Pi without complex wiring or external driver circuits, making motor control simpler and safer. This HAT is ideal for students, makers, educators, and engineers who are building robotics or motion-based projects and want a clean, plug-and-play solution. This motor driver HAT is widely used in robotics, automation systems, and prototyping projects where smooth and controlled motor operation is required. With PWM-based speed control and seamless Raspberry Pi compatibility, it allows easy integration into existing projects and code setups. The stable performance and straightforward design make it suitable for classroom learning, DIY robotics, and early-stage product development where reliable motor control is essential. Hardware Overview Features: Designed specifically as a motor driver HAT for Raspberry Pi PWM-based speed control for smooth motor operation Supports both single-signal and dual-signal motor control modes Simple plug-and-play installation on Raspberry Pi GPIO header Ideal for robotics, automation, and motion control projects Reliable performance suitable for education, prototyping, and DIY builds How to Use The SmartElex 10D DC Motor Driver HAT can be controlled in two different ways depending on your project requirements. Using Two Control Signals (Speed and Direction) In this mode, two separate control signals are used. The PWM signal is applied to the PWM pin to control the motor speed, while the DIR pin is used to control the motor direction. This method offers straightforward and precise control, making it ideal for most robotics and automation applications. Using One Control Signal (Combined Speed and Direction) In this mode, only one control signal is required. The PWM pin is connected to a logic high level, and the DIR pin receives the PWM signal. When the PWM duty cycle is 50%, the motor stops. If the duty cycle is below 50%, the motor rotates in one direction, and if it is above 50%, the motor rotates in the opposite direction. The actual rotation direction depends on the motor wiring

Official Raspberry Pi 45W USB-C Power Adapter The Official Raspberry Pi 45W USB-C Power Adapter is the ultimate raspberry pi power supply for ensuring stable and efficient performance of your Raspberry Pi 5 and other USB-C compatible devices. Featuring USB Power Delivery (PD) support, it intelligently negotiates voltage and current levels, allowing the Raspberry Pi to power high-demand accessories like SSDs without compromise. With five built-in PD profiles ranging from 5.1V to 20V, this raspberry pi power adapter also doubles as a versatile charging solution for laptops, tablets, and smartphones.The included 1.5m 17AWG USB-C power adapter cable ensures optimal power transfer with minimal loss. Designed with precision and reliability in mind, it’s a must-have for makers, developers, and tech enthusiasts seeking dependable performance in their Raspberry Pi setups. Features 45W Output Power - Delivers dependable, high-power output for the Raspberry Pi 5 and other USB-C devices. Supports USB PD (Power Delivery) : automatically adjusts output based on device requirements. Optimised for Raspberry Pi 5 - Provides consistent 5V/5A power to ensure full performance. Multiple Voltage Profiles - Supports 5V, 9V, 12V, and 15V output for increased compatibility. High-Quality Build - An official Raspberry Pi product built for safety and efficiency Integrated USB-C connector - Plug and play with contemporary Raspberry Pi boards and accessories. Reliable and Safe : Built-in protection against overvoltage, overcurrent, and short circuits. The universal input voltage (100-240V AC) makes it appropriate for worldwide use.

Waveshare UGV Rover ROS 2 Open-source 6 Wheels 4WD AI Robot Suitable for Raspberry Pi 4B / Raspberry Pi 5 Dual controllers, All-metal Body, Flexible and Expandable The UGV Rover ROS 2 Open-source 6-Wheel 4WD AI Robot is a robust, all-metal mobile robotics platform designed for versatile development and real-world navigation. Featuring dual controllers, a flexible and expandable chassis, and seamless ROS 2 integration, it delivers reliable performance for autonomous tasks and intelligent robotics projects. Compatible with Raspberry Pi 4B and Raspberry Pi 5, this rover is perfect for learners, innovators, and developers looking to build advanced AI robotics systems with powerful hardware and modular expandability. Features Supports Pan-Tilt drag-and-drop control via mouse or touch panel of the laptop, providing a better control experience as FPS games Based on Raspberry Pi Designed to support both Raspberry Pi 5 and Raspberry Pi 4B, this robot leverages the strong computing capabilities of the Pi ecosystem to handle more complex tasks with ease. Its expandable architecture unlocks more possibilities for AI, automation, and ROS 2 development. Advanced AI Recognition & Tracking Based on OpenCV, supports color recognition and automatic targeting with one-key Pan-Tilt control and auto LED lighting. Expandable for additional AI functions. Face Detection & Recognition Automatically captures photos or records videos when a face is detected, providing enhanced security and AI interaction. Cross-Platform Web Control No app installation required! Simply connect via a web browser on mobile, tablet, or PC. Supports WASD keyboard shortcuts and mouse control for seamless navigation. WebRTC real-time video transmission Adopts Flask lightweight web application, based on WebRTC ultra-low latency real-time transmission, using Python language and easy to extend, working seamlessly with OpenCV Features at a glance Multiple Autonomous Navigation Modes UGV Rover supports multiple autonomous navigation modes, allowing it to navigate complex environments with precision. Whether following predefined paths, avoiding obstacles, or performing AI-assisted route planning, the robot adapts intelligently to real-world terrains.

Cytron CM4 Maker Board for Raspberry Pi The Cytron CM4 Maker Board is a powerful and reliable development board built around the Raspberry Pi Compute Module 4 (CM4), designed specifically for Pro Makers, hardware hobbyists, educators, and embedded developers. With its wide input voltage range, convenient power button, and multiple boot options - including microSD, NVMe SSD, and CM4 eMMC, this Cytron board gives makers complete flexibility in how they build, experiment, and deploy their Raspberry Pi projects. It also retains essential interfaces like Gigabit Ethernet, USB 2.0 ports, HDMI, CSI, and DSI, ensuring compatibility with Raspberry Pi HATs and common accessories. Cytron enhances the standard CM4 experience by adding practical maker-friendly features such as on-board RTC (PCF85063A), Grove ports, Maker Port, 10 GPIO status LEDs, a piezo buzzer with mute switch, and dedicated push buttons. Whether you are creating IoT prototypes, robotics systems, dashboards, or long-running automation projects, the Cytron CM4 Maker Board offers stability, bigger storage options, real-time clock capability, and the expandability required for advanced Raspberry Pi development. Features: The Cytron CM4 Maker Board supports a wide input voltage range through a 7–18V DC jack or 5V USB-C, making it adaptable for various maker setups. Cytron includes a convenient hardware power button, allowing safe shutdown and easy startup without needing terminal commands. The board supports multiple boot sources, including microSD, NVMe SSD (2230/2242), and onboard eMMC on CM4 for faster and more reliable storage. Includes all essential Raspberry Pi features like Gigabit Ethernet, 4× USB 2.0 ports, HDMI, CSI camera port, DSI display port, and 3.5mm audio out. Equipped with PCF85063A RTC, enabling real-time clock functionality even without an internet connection. Cytron adds maker-focused extras such as Grove ports, Maker Port, 10 GPIO LEDs, piezo buzzer, and push buttons for quick prototyping. Pinout Diagram:

SmartElex Sound Detection Sensor The SmartElex Sound Detection Sensor is a compact and efficient sound sensor module designed to detect sound presence and measure sound intensity with precision. Built around the LM386 audio amplifier, it provides both analog (AOUT) and digital (DOUT) outputs, making it suitable for a wide range of applications—from simple sound-triggered actions to detailed audio level monitoring. Operating smoothly between 3.3V and 5.3V, this sound sensor Arduino compatible module integrates easily with popular development boards such as Arduino, STM32, and Raspberry Pi. Its low power consumption, small form factor, and included 4-pin cable make it perfect for sound-activated projects, noise detection systems, smart devices, and interactive electronics where reliable audio sensing is required. Features: LM386 audio amplifier for a powerful sound signal enhancement. Detect low-level sounds with 200× amplification. Wide voltage range: 3.3 to 5.3 volts Dual outputs: analog (AOUT) and digital (DOUT). Low power consumption, suitable for embedded systems. Adjustable gain using external components Compact and lightweight; breadboard-friendly. Simple integration with Arduino, STM32, and more.

Cytron Maker Pi RP2040 – Robotics Controller Board with Raspberry Pi The Cytron Maker Pi RP2040 is a compact, beginner-friendly robotics controller board powered by the Raspberry Pi RP2040 microcontroller. Designed for DIY robotics, automation, and motion-control projects, this board integrates a dual-channel DC motor driver, four servo ports, and seven Grove connectors - giving makers everything they need to build robots without complex wiring. With compatibility across CircuitPython, MicroPython, C/C++, and even the Arduino ecosystem, this board ranks among the best RP2040 robotics controllers for students, hobbyists, and educators. Built for convenience, the Maker Pi RP2040 supports multiple power input options (USB, LiPo battery, or VIN), includes onboard functional test buttons, and features status LEDs for easy debugging. The preloaded demo code lets you start controlling motors, playing melodies, and testing GPIOs right out of the box. Whether you are exploring Raspberry Pi’s RP2040 ecosystem or building an advanced robot, the Cytron Maker Pi RP2040 robot controller offers exceptional versatility, ease of use, and reliable motor-driving performance. Features: Powered by the Raspberry Pi RP2040 dual-core Arm Cortex-M0+ processor. Includes dual-channel DC motor driver and four servo motor ports for robotics. Seven Grove ports support digital, analog, I2C, SPI, and UART expansion. Preloaded with CircuitPython for easy plug-and-play coding. Supports USB 5V, LiPo 1-cell battery, or 3.6–6V VIN input with automatic switching. Built-in LiPo charging circuit with safety protections. Onboard piezo buzzer, RGB LEDs, GPIO test LEDs, and push buttons. Quick-test buttons and motor output LEDs for immediate motor testing. Fully compatible with the Raspberry Pi Pico ecosystem, MicroPython, C/C++, and Arduino cores. Includes LEGO-compatible mounting holes and M3 mounting points. Board Layout: Dimension:

Maker pHAT for Raspberry Pi – Headless Setup, GPIO Debugging & Built-In I/O The Maker pHAT for Raspberry Pi is designed to make electronics, coding, and headless setup dramatically easier for beginners, educators, and STEM learners. With built-in USB-to-UART, onboard LEDs, push buttons, and an active buzzer, this Raspberry Pi HAT simplifies GPIO debugging, troubleshooting, and prototyping. It eliminates the need for extra components, messy wiring, or a monitor-keyboard setup - making it perfect for classrooms, DIY projects, and Raspberry Pi learning environments. Maker pHAT fits perfectly on Raspberry Pi Zero and works seamlessly with Raspberry Pi 3B/3B+/4B models using the included stacking header. It provides labeled GPIO pins for easy connection, LED indicators for real-time feedback, and push-button support for proper system shutdown. Whether you are exploring electronics, teaching students, or building quick prototypes, Maker pHAT delivers a smoother, faster, and frustration-free Raspberry Pi learning experience. Features: Designed in Raspberry Pi Zero size, stacking perfectly on Pi Zero / Zero W / Zero WH and fully compatible with Raspberry Pi 3B/3B+/3A+/4B series. Supports headless setup easily via onboard USB-to-UART (Rev1.10 uses FT231X), removing the need for monitor, keyboard, or mouse. Equipped with LED indicators for key GPIO pins (GPIO 17, 18, 27, 22, 25, 12, 13, 19) to simplify GPIO learning and debugging. Features 3 programmable push buttons (GPIO 21, 19, 20) for input learning and safe shutdown functionality. Includes active buzzer on GPIO 26 for audio output in projects and coding exercises. Comes with clearly labeled GPIO footprint, including SPI, UART, I2C, 5V, 3.3V & GND for easier wiring and prototyping. Powered via USB Micro-B 5V input from laptop, USB adapter, or power bank. Built using a Purple PCB, making it visually attractive for classroom and DIY setups.

Official Raspberry Pi 500+ SC1237 – Premium Desktop PC (US Layout) The Official Raspberry Pi 500+ SC1237 – Premium Desktop PC (US Layout) is a powerful and human-centered computing solution that blends performance with simplicity. Built on the advanced architecture of the Raspberry Pi 5, this all-in-one desktop integrates a high-quality mechanical RGB keyboard with a US layout, making it perfect for long coding sessions and everyday productivity. With 16GB LPDDR4X RAM, it handles multitasking effortlessly, while the 256GB SSD preloaded with Raspberry Pi OS ensures fast boot times, responsive performance, and plenty of storage right out of the box. Designed for students, developers, and professionals alike, this premium Raspberry Pi desktop PC offers dual USB 3.0 ports, HDMI output, and a compact footprint—delivering a seamless computing experience for programming, media consumption, and creative projects in one sleek device. Features: Successor of Raspberry Pi 500 and 400 series Powered on the Raspberry Pi 5 platform 16GB LPDDR4X-4267 SDRAM allows for smooth multitasking. Preloaded 256GB SSD with the Raspberry Pi OS. Integrated mechanical RGB keyboard design. Dual USB 3.0 ports for fast connectivity. HDMI outputs for dual display support. A compact, all-in-one desktop solution

Official Raspberry Pi 5 Model B 1GB RAM The Official Raspberry Pi 5 Model B with 1GB RAM represents a major leap forward in single-board computing performance. Powered by a 2.4GHz 64-bit quad-core Arm Cortex-A76 processor, it delivers up to 2–3× the CPU performance of the previous generation, making multitasking, programming, media handling, and edge computing smoother than ever. With an 800MHz VideoCore VII GPU, the Pi 5 offers significantly improved graphics capabilities and supports dual 4Kp60 display output for high-resolution applications. The redesigned Image Signal Processor enhances camera performance, making it suitable for AI vision projects, surveillance systems, and advanced imaging solutions. Whether you're building a smart device, automation system, media center, or industrial controller, this latest generation Raspberry Pi 5 provides a seamless and powerful desktop-class experience in a compact form factor. Features: Processor: Quad-Core 64-bit Arm Cortex-A76 @ 2.4GHz RAM: 1GB LPDDR4X GPU: VideoCore VII @ 800MHz Display Support: Dual micro-HDMI, up to 4Kp60 each Core Function: High-performance single-board computer for embedded systems, IoT, automation, AI edge computing, and desktop applications Performance Boost: 2–3× faster CPU than Raspberry Pi 4 Camera Support: Improved ISP for advanced image processing

Raspberry Pi USB 3.0 128GB Flash Drive for Raspberry Pi Computers The Raspberry Pi USB 3.0 128GB Flash Drive is a compact and reliable storage solution designed specifically for Raspberry Pi computers. With a generous 128GB capacity, it provides ample space for operating systems, project files, software libraries, and backups. The USB 3.0 interface ensures fast data transfer speeds for quicker boot times and smooth performance, while remaining fully compatible with USB 2.0 ports. Built with a durable metal body, this lightweight flash drive is easy to carry and can be attached to a keyring or lanyard, making it perfect for students, developers, and makers who need portable, high-quality storage for their Raspberry Pi projects. Features: USB 3.0 High-Speed Performance – Delivers strong random and sequential I/O performance for faster read and write operations. Optimized for Raspberry Pi – Designed to work seamlessly with Raspberry Pi and other compatible devices. Compact & Portable Design – Sleek form factor makes it easy to carry and use anywhere. Reliable Power Efficiency – Moderate power consumption ensures stable operation. Power-Loss Resilience – Enhanced protection against unexpected power interruptions. Versatile Usage – Ideal for storing, transferring, and backing up data. Boot & OS Ready – Suitable for installing and running operating systems directly from the drive.

SmartElex PAM8403 5V Two-Channel Stereo Mini Class-D Audio Amplifier The SmartElex PAM8403 5V Two-Channel Stereo Mini Class-D Audio Amplifier is a compact audio amplification module designed to deliver clear and efficient stereo sound from low-power audio sources. It solves the need for adding audio output to small electronic projects without bulky components or complex circuits. This module is suitable for students, makers, engineers, educators, and startups who want an easy way to integrate stereo audio into DIY electronics, learning kits, and embedded system prototypes. This stereo mini Class-D audio amplifier is commonly used in robotics, IoT devices, automation systems, and portable electronics that require lightweight and power-efficient audio output. It can be easily interfaced with platforms such as Arduino, Raspberry Pi, and ESP32 to drive small speakers in projects like voice alerts, sound feedback systems, and interactive devices. The simple design and stable performance make it easy to integrate into both prototype builds and finished products, enabling reliable audio output with minimal setup effort. Features: Two-channel stereo Class-D audio amplifier for clear sound output Operates on a 5V power supply, ideal for embedded projects High efficiency design with low heat generation Compact size suitable for space-constrained applications Drives small speakers for stereo audio output Compatible with Arduino, Raspberry Pi, ESP32, and other audio-enabled projects

160mm Aluminium CPU Heatsink This is a 160mm Long Aluminium Water Cooling Block Liquid Cooler Waterblock Radiator-GPU CPU Cooling Heatsink.  The CPU heatsink has a solid construction and choosing aluminium as the raw material is a wise option for heat dissipation. The surface of the heatsink is treated by the method of silver oxidation. It is suitable for cooling graphics GPU, motherboard Northbridge Southbridge CPU, graphics; semiconductor cooling piece, industrial cooling, etc. The CPU heatsink is a water cooling block where the heat dissipation method of that the liquid conducts the cold and heat exchange. Features: High Thermal Conductivity: Made from aluminum, which is an excellent conductor of heat. Large Surface Area: The 160mm size provides a large surface area for effective heat dissipation. Lightweight: Aluminum is lightweight, making it suitable for various applications without adding significant weight. Durable: Resistant to corrosion and can withstand high temperatures. Easy Installation: Designed for easy mounting on CPUs. Efficient Cooling: Helps maintain optimal operating temperatures and prevent overheating. Applications: Computer Systems: Used to cool CPUs in desktops, servers, and workstations. Gaming Rigs: Helps maintain optimal temperatures in high-performance gaming PCs. Industrial Equipment: Applied in industrial computers and control systems to prevent overheating. Power Amplifiers: Used in audio and RF power amplifiers to dissipate heat. LED Lighting: Helps manage heat in high-power LED lighting systems. Consumer Electronics: Used in various electronic devices that require efficient thermal management.

Original Meta Quest 3S VR Headsets 128GB Get ready to step into the future with Quest 3S! This game-changing leap makes mixed reality more accessible than ever. We’re thrilled about the endless possibilities it unlocks—are you? Unlock Thousands of Mind-Blowing Immersive Experiences! Experience MR gaming, fitness and entertainment, including your favourite apps, like Facebook, Instagram and WhatsApp—all within the headset. Entertainment: Dive into an unmatched viewing experience like never before. Gaming: Don’t just play—immerse yourself in your favourite games with Meta Quest. Sports: Feel the thrill of courtside action, no matter where you are. Fitness: Crush your fitness goals while having fun, all from the comfort of your home. Get Hands-On Feel the action like never before with precision controllers that move as naturally as you do. Plus, with upgraded tracking, you can ditch the controllers and dive in hands-free! Your Gateway to Gaming Pick your perfect Meta Quest and explore a constantly expanding catalog of games designed to keep you coming back for more! Features 4.5X better resolution and color than Quest 2 for clearer, more vibrant visuals. 96° x 90° field of view with sharp detail of ~20 pixels per degree and ~773 pixels per inch. Powered by Snapdragon XR2 Gen 2 chipset and 8GB RAM for faster, smoother performance. Glasses spacer included for comfort during long use. Precision controllers that feel natural and controller-free tracking for hands-free use. Blends apps and games into your surroundings for a fun mixed reality experience. Batman: Arkham Shadow game included with 128GB and 256GB models. 3-month Meta Quest+ trial for extra games and content. Comes with a 1-year limited warranty. Introducing Meta Quest 3S

DIY Solar Powered Ferris Wheel Kit Along with teaching your kid about assembly, motors and batteries, add a perfect showpiece of your kid's invention at your home! Learn to harness the power of solar to ferry the wheel which can be converted into a solar powered Fan. Solar Ferris Wheel is a creative solar toy. It uses sunlight to generate electricity and drives the blue turntable to rotate tirelessly. It is vivid and creative, It can be used to effectively decorate your ship and entertainment platform, and also great for living room, bedroom, office and so on. Can be used as a small decorative item in the home, indoors or outdoors. It is a handmade model, and all made of environmentally friendly abs plastic materials, the solar energy Ferris wheel can be used as a toy for children, and it can also be used as a gift for children. Features: It's an educational toy set which is great for kids training their intellectual development, hands-on brain, interest in culture, grip, hand-eye coordination. Parents can DIY with their kids and promote their parent-child communication in the process of assembling. It is very easy to install and does not require special tools. Lightweight and portable, unisex for all ages The finished toy can turn with sunshine . Under direct sunlight, the use of solar energy, can be slowly rotated (rainy days and indoor solar function can not be used) Exquisite workmanship, but also as a peculiar and unique crafts indoors. Package includes several sets of white pillars , and vary in length , you can choose the appropriate combination according to personal preference , to produce a dozen different combinations of rotating disk , you can install the 8 ball can also be installed 4 balls. Also check Windmill DIY Kit offered by ROBOCRAZE. The DIY kit is designed for children aged 3 and above, providing a fun and educational project to construct a windmill. It includes components such as a 2-Pin SPST Switch, 9V battery with a battery cap, toy motor, and a small plastic fan. The windmill can also function as a mini fan.