my daughter likes those - she has other shapes - a sudoku cube, tetrahedra with triangles on the sides, and sadly we had to throw out a skewxtreme and a megaminx - one was a cross and the other twelve sided polygon with hexagons to move around
@yrhenwr they have cheated.... They use instructions found on the internet. His daddy can now do it but has never achieved it before. They are working on remembering the algorithm so they can do it from memory!