Links and related pages.

Happy Cube main site
Happy Cube UK distributor
The makers of the Happy Cubes.

Happy Cube (Wirrel Warrel) Solver
Another, textual solver for the happy cubes.

Wikipedia page
The Happy Cube Inventor
Probably the finest puzzle in the World
Various Puzzles
The inventor's site, with some explanations about the Happy Cubes

Mathematische Basteleien
Yet another explanation about the Happy Cubes and other clones.

A clone with an unfortunate name.