The Happy Cube Junior 24 Display contains 24 puzzles = 4 x 6 different foam cube puzzles. by Smart Games
There are three main missions for this six-piece foam cube.
The first is to build a perfect cube (3D), the second is to put the pieces back into the frame (2D), and lastly you can combine several Happy Cube puzzles together to create a multi-dimensional shape. In the Happy Cube range, there are six different puzzles (blue, green, yellow, orange, red and purple). 
This is a single player game.