crabfu [ 1 ] creates three-legged remote-controlled crab-like robots called swashbots.
for the exoskeleton of swashbot 3 [above video], shapelock was used. it is a plastic that melts in hot water, can be molded, locks rigidly at room temperature, and is super strong, flexible, tough, safe and reusable.
videos and photos of all swashbots can be found on the swashbots page.