List Price: $14.99 Deal Price: $11.13 You Save: $3.86 (26%)There are only seven pieces in this puzzle, so it should be easy. Right? Guess again! Sixty puzzle cards show sixty three-dimensional structures for players to replicate using the seven pieces. Each of the pieces, based on three or four connected cubes, is unique. Originally known as the Soma Cube, Block by Block is an excellent way to develop and refine spatial perception skills.Expires Feb 25, 2011