Gikfun 2WD Mini Round Double-Deck Smart Robot Car Chassis DIY Kit for Arduino EK1780

this is what I like to call the plank robot kid robot chassis kid since of two wheels two motors encoders and this caster a battery box although some people tell you that four batteries is probably not enough power to power most microcontrollers you get it you get two wheels two motors two encoders four screws for the battery box and nuts for motor mounting brackets and screws and nuts an on/off switch here and the mounting chassis along with the caster and the screws to mount it in the castro including these standoffs here you'll need two tools a screw driver and a pair of pliers so the assembly of this thing goes fairly easily you take one of your motors and you take two of your motor mounts you're gonna stick the first one on to this side and the second one on the edge there and hold it with your finger got that and the white parts go towards the back where the plus signs are you'll