My 5 year old built this, all by himself, out of Duplos and calls it a Rocket Pistol Swordfish. The very back part comes off and can work as a pistol while still using the rest as a rocket launcher. Apparently the front has a sword attached. When I told him I wanted to take a picture of it, he asked me "Are you gonna put it on GeekDad?" I told him only if he gave me permission.