A Happy Cube for kids as young as 4! Get acquainted with the easiest member of the puzzle box family. Every puzzle piece has a recognizable symbol. You’re not only training logical, creative, and lateral thinking, you can now also train language skills! Each one of the six foam puzzles is unique and has multiple solutions. Try to first build a 3D cube with the six puzzle pieces. Ready? Now try to place all pieces back into the 2D frame! You can also combine all six puzzles to build big colourful foam constructions.