rallax continuous rotation servos for the drive wheels (#900-00008) Sensors including whisker-switches, phototransistors, and infrared emitter/receiver pairs LEDs and a piezospeaker for audio and visual feedback All the resistors, capacitors, and jumper wires needed to build the circuits All the screws, nuts, and other hardware needed to build the Boe-Bot Parallax #1 Phillips/flathead screwdriver