Ping Robot Chasis

One of the simplest robot designs, it uses a ping pong ball instead of a coaster or a free wheel
this was designed for 3 mm plywood

things you'll need to assemble this
12 - M3 x 10 + nuts
4 - 45 mm spacer + screws + nuts
4 - 12 mm spacer + screws + nuts
1 - 4xAA Battery case
1 - standard sized ping pong ball
2 - plastic gearbox dc motor (Straight) + wheels

also you'll need a driver and a microcontroller