This is a completely homemade mad scientist Lego man costume made as close to scale as possible. The materials used are primarily cardboard and Styrofoam. The paint job is made to look exactly like the mad scientist Lego minifig from a collection.
The mouth is made from black panty hose such that I can see through. The hands and legs are fully mobile. The legs are connected to the body using a wooden bar to allow for rotation and some elevation so it doesn’t hit the floor. There is of course a Lego logo on the back. I have additional photos that follow the construction of the head and body. Sharpies were used for the detail on the body and right upper leg.