[Rick TYler]

Most robotics kids underestimate the strength and flexibility of wood and wood composites. Here's a link to a Wikipedia article on the de Havilland Mosquito, a WWII British fighter-bomber made largely of plywood: http://en.wikipedia.org/wiki/De_Havilland_Mosquito. It could carry 1,000 pounds of bombs nearly 1,500 miles, and fly almost 400 miles an hour.

Or how about a plywood/composite boat that can go 50mph and has a hull that only weights 875 pounds?: http://www.bateau.com/studyplans/MG2....htm?prod=MG20

Nothing we do with robots is as tough as these engineering problems.