Create a fun book display, storytime, study spaces or storage for kids"Modular S" system features cubes in several shapes that you can mix and match for one-of-a-kind storage pieces. Units easily disassemble to move or reconfigure as your needs change. The 11 1/2"D cubes are constructed of durable 1/2" maple plywood for strength and finished with non-toxic vegetable stain. Large holes are pre-drilled for simple joining of components with optional plastic connectors (part number GM4303). Simply place the connectors on either side of pre-drilled holes in boxes or cubes and screw together. Holes are large enough so little fingers can't get stuck. FREE Design Kit (part number GMK) is the miniature version of these blocks, which allows you to design before constructing. Available in 1 wood finish and 3 color finishes: -85 natural maple, -02 blue, -10 green, -18 red Overall dimensions:GM4300 (Open Box): 23H x 23W x 11 1/2"DGM4301 (Open Cube): 11 1/2H x 11 1/2W x 11 1/2"DGM4302 (Diagonal Cube): 11 1/2H x 11 1/2W x 11 1/2"DGM4308 (Quarter Round Cube): 11 1/2H x 11 1/2W x 11 1/2"DGM4309 (Concave Cube): 11 1/2H x 11 1/2W x 11 1/2"DGM4325 (Rectangular Cube): 23H x 11 1/2W x 11 1/2"D