This slow speed robot moves in a zig-zag pattern and can detect Styrofoam peanuts. The Peanut Mover will stop when it detects a peanut and then sound a shrill alarm You can also configure the Peanut Mover Robot to push a peanut along the floor until a wall or other obstacle is reached. At the wall it will stop an sound its alarm. Have races against other Peanut Mover robots! Fun to build and operate. Works best in low light conditions on smooth surfaces. Features 2 motors, flashing LEDs, front brush, and a 6 transistor circuit. Size of PC board is 5.2" x 2.4". Operates on one 9V battery (not included). Complete with all parts, PC board and instructions. Skill Level 2.