This holiday season, let the littleBits Robot Butler pass the food around the table for you. This smart little creature roams the table on a central wheel that is connected to a dc motor. Little plastic laser-cut arms activate three roller switches on the side as they bump into cups and bowls, causing the robot to turn and try elsewhere. This happens because there is an inverter in between the first dc motor and a second dc motor positioned on the edge. For more information about the circuit, click here. To make your own, follow these instructions.