3 yrs. & up. Dado Cubes combine art and science as you explore architectural principles - proportion, balance, structure and color. A new twist on classic building blocks, Dado engages your imagination as the slits on each cube are interlocked to create an unlimited number of three-dimensional structures. Constructed horizontally, vertically or nested together, Dado invites visual spatial development and problem solving through design-centered, attention-grabbing fun! Includes 10 cubes, scaled from 1 inch to 5 inches, one set is capable of building structures over 32 inches high!