3v Relay Board Raspberry Pi Arduino Relay Module 1 Channel Opto-Isolate High Level Trigger for IOT ESP8266 Microcontrollers Development Board: Amazon.com: Industrial & Scientific
Amazon.com: Elenco 130-in-1 Electronic Playground and Learning Center : Toys & Games
Amazon.com: Teyleten Robot ESP32S ESP32 ESP-WROOM-32 Development Board 2.4GHz Dual-Core WiFi +Bluetooth 2 Function Microcontroller for Arduino (ESP32 30P, 3PCS) : Electronics
Amazon.com: SparkFun RedBoard - Compatible with Arduino Breadboard-able Development board w/ R3 footprint Microcontroller serves as physical computing learning platform Connect to computer with USB Mini-B : Electronics
Amazon.com: HiLetgo 3pcs ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Large) : Electronics
Arduino UNO REV3 [A000066] + Free Shipping
Amazon.com: Science Can Circuits for Kids, Beginner Circuit Board Electronic Kit with 80 Experiments Stem Activities for Boys and Girls, Educational Toys Science Kits for Kids : Industrial & Scientific