Have you seen this? It is a tricky bit of a puzzle. It is not terribly difficult to solve as far as shape is concerned (not so easy either), but the challenge lay in getting the patterrn as well.
Once the standard Rubik's Cube has gotten routine, this is a way to follow up the fun.
According to the description given:
"Product Description: A twisting puzzle challenge that takes the form of thousands of shapes. Solve one shape and move onto another - or devise your own creation to defy your friends. Rubik's Twist - it'll charm you!"