UK Maker blog:

recently i came across a great looking material called Polymorph or Shapelock in the US. Its a polymer similar to Nylon but with a very low melting point (62C). This means that when it is put in hot water it becomes soft and mailable, it can then be sculpted and moulded in to any shape you want. When it cools it returns to its normal state and is actually very hard.above is a picture of a robotic crab called Swashbot 3 it's made entirely out of polymorph and looks brilliant. I've ordered 1kg of polymorph and a whole load of micro servos, time for a walking robot me thinks :)