This is a 3-wheeled robot driven by 2 modified servos. I countinuous re-build the robot(thats why it's looking so messy on the photo) right now it can navigate and watch out for obstacles with IR detectors and IR leds. I've also build't an IR reciever of it connected to my PC to control winamp and other stuffs(visualB code). the cost was only 110$ because i already had some parts and buildt everything myself. i got no idea how long time it took to build it but i would guess 6 month (i didn't work with it every day). it was up and go'in after about 1 year(!),i had ALOT of problems getting the bs2sx to work... size: 38 x 29 cm body of plywood Motors: 2x modified servos Navigation: 2x ir leds 2x ir detectors power: 6x 1,2v and lots of experimental stuff it consumes about 400ma when it's driving. i got the whole idea of building it after i had visit the swedish site www.robotshop.nu Email: solkatt180@hotmail.com