The Elecfreaks Ring:bit Car is a small DIY smart car powered by micro:bit. The ring:bit extends the micro:bit's 3 GPIO ports and allow for different sensors and components to be easily attached to the micro:bit.
The ring:bit car can be operated via remote control from another micro:bit, or you can program it to run autonomously. You can add sensing capabilities, joystick control from another micro:bit, or beautiful LED's with the following popular add-ons:
Check out this introduction video by our friends at Elmwood Electronics: