Calvin's Square-1 Puzzle is a shapeshifting brainteaser variant to the standard 3x3x3 cube. Also known as the Cube 21, it adds an extra level of challenge to solve due to its changing shape. The object is to match the colors on each side.
For Ages: 8+
WARNING: CHOKING HAZARD due to small parts. Not suitable for children under 3 years of age.
|Age Range:||8 Years|