We're the Shadowbots and our robot has a claw that can grab a 1 1/2" cube and put it on top of a 7 1/2" box. On the back, there is a metal plate with two smaller plates on the side to push the cubes too. The dimensions of our robot are 21"x8"x8" (w/ attachements). It is 4WD with 2 motors for the wheels and 2 for the claw.jllkj