Ir Bot is an small inexpensive robot controlled by an basic stamp and powerd by a 9V battery and a 4,8 V Servo Battery pack. It's only sensors is an irpd module wich is guiding it around an room and can be programmed to do some wall following behaviors. It took me about 24 hours to build and program and costs about $100. Parts used : 2 big lego wheels 1 round glass plate as base 2 servos 1 basic stamp module 1 Irpd module 1 9V Battery 1 4,8 V Battery pack 11 parallel leds 1 piece of pvc experiment board For parts and other robots please visit www.lynxmotion.com, www.parallax.com or email me at christian.vlaskowits@descom.se Email: christian.vlaskowits@descom.se