The 4WD Mini Robot Platform uses 4 DC motor gearboxes to drive itself. Four plastic wheels are press-fit onto the DC motor gearbox output gear shaft. It makes a nice drive solution for small robots.This Mini Robot Mobile Platform frame is made of 5051 aluminum alloy and features an anodized orange color. It is also compatible with Arduino controllers. It is easy to add all kinds of sensors and in order to make your idea work. This is a good starting kit for students.