Ring:bit expansion board: A simple PCB for the micro:bit. (1)Extends the micro bit’s 3 GPIO ports. (2)Convert the P0/P1/P2 port to the common GVS port. (3) loaded with 3 pieces of AAA batteries to drive the car or other accessories. Six Fun Cases In One micro bit kit: kids can build 6 shapes, including traffic lights, brick cars, temperature-controlled fans, smart desk lamps, wipers, and a trebuchet. Well-designed Assembly Instructions and Courses: these make the kids learn coding easily as well as how to build blocks in an interesting way. This micro bit kit includes almost 200 Pieces Bricks: In fact, children can use these rich building blocks to build more of their favorite shapes.