The Happy Cube 3D puzzle is based on a simple concept. It's ingenious but suitable for all ages. There are 3 main missions: with 6 puzzle parts, you first build a perfect cube (3D) and then you fit the pieces back into the frame (2D). You can also combine several puzzles and create multi-dimensional shapes. There are 6 different Happy Cube puzzles to collect: Milano (blue), New York (green), Tokyo (yellow), Amsterdam (orange), Paris (red) and Brussels (purple). Ages 5+.