This Crab Droid is from the battle of Utapau in the third Star Wars movie. I think that LEGO should make a set of this really cool droid and this is my version of it.
Minifigures: Clone Trooper (212.), Commander Cody, Obi-Wan Kenobi (Episode three), Battle Droid, Commander Battle Droid
The Crab Droid: It is nearly minifig size. The legs are movable and on the downside of the foot are guns.
The set would cost 30$ and be a cool addition to our separatist armies.