Modular Base

This is another robot I designed for FLL. It has several interlocking modules.
The first is the one with the NXT and motors on it, and the second is the base, with gears, wheels, and attachments on it. The first module just snaps into the second one, the base, engaging the motors with the wheels. Then you send out your robot to do the mission. When your robot comes back you exchange the base with a new one. It only takes about 1 second to snap in. The point of this is to minimize base time, a big negative factor in many robots, because you only get 2.5 minutes to do all your missions.