Meffert’s Molecube by RecentToys

The Molecube Challenge

The object of this puzzle is to scramble up all of the colors and then return it back to its original starting position. Unlike most rotational puzzles, the starting position is not a solid colour on each face; the goal of this puzzle is to make it so that there is only one of each color on every face, vertical line, and horizontal line.  

Ages: 9+