Cube Up! is a fun Building Design Activity that develops spatial perception and design skills in children. Using the Montessori Volume Cubes (Item Number 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 backof 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.