Grades PreK and up. Each wooden block contains safely embedded magnets that keep blocks together and even allow builders to defy gravity for more unique creations. Made of eco-friendly wood with a safe, nontoxic water-based finish. Pieces range in size from 13/16 in. x 13/16 in. x 3-9/16 in. to 8-1/4- x 13/16 in. x 5/16 in. Includes 130 blocks in 17 shapes: 12 cubes, 16 tall columns, eight medium columns, 20 mega planks, 12 long planks, 14 short planks, four short angles, eight triangles, six parallelograms, eight wheels, four speed wheels, two propellors, four robot heads, four solar panels, two electric charging stations, four robot tread medium columns, and two triangular tank treads. Includes an idea booklet.