This is my custom Crab Droid design, I tried to make it as accurate as I could to what we see in Revenge of the Sith. It six legs with three points of articulation, two guns positioned under then head and is pretty much minifig scale!

Playability (4/10): While it does have lots of articulation and everything you might need from a crab droid it is quite fragile, due to the body being made up of one stud connections.

Animatable (8/10): Due to the extra articulation is can be posed easily, but it cannot be connected to studs. Display (10/10): Definitely a display model, it has all the details you might need from a crab droid while keeping to minifig scale.

The Instructions only include how to make the Crab Droid, none of the minifigs/ droideka build are included and are only shown for scale.