Were you the type of child who melted your plastic army men together to make mutant soldiers?  Were you like Sid from Toy Story who made mutant mash-ups from all of your toys? Then perhaps 3D printing will help you take your mutations to the next level? Like Trinifigure – Three Legged Minifigure.

A Lego-compatible, three legged, two headed mini-figure. Legs are fully
moveable. Only the torso and the hips/legs are included, you must
provide your own heads and arms.

MUTANT LEGO from 3D Printer