This giant walking crab was built by the imagination of resident LEGO genius Carter. Using pneumatics, the crab walks with two 3-point movements (front and back leg of one side with the middle leg of the opposite side). A series of 4 motors perpetually pressurizes 3 air tanks supply the power. A mot...

Popeye the Crab (named for his eye that continually popped off during construction) is a LEGO creation fabricated by a 14 year old boy. Popeye walks with a 3-point motion and runs automatically with a switching system on the back, which controls the pneumatic legs.