Cube Up! is a fun building design activity that develops spatial perception and design skills in children. Using the Montessori Volume Cubes (0188A0), students visualize and construct three-dimensional structures from the two-dimensional views shown on each card in the set. The degree of difficulty increases with each level, and a solution key is printed on the back of each card as a check for accuracy. Includes: Level one and Level two activity cards, divider tabs, and a wooden box for storage. Designed by Mark Powell.