Category : Toys/GamesSon-Mum 4x4x4 II Cube - Black BodyPrice: USD68.99 The mf8 Son-Mum 4x4 II can still function like a regular 4x4, but if you turn one or both of the middle layers half way, you can unlock new moves and also scramble the inner pieces! A difficult variant in the Son-Mum series.Other products from Puzzle Master |