Take learning to new heights with KEVA planks! Includes ideas for over 40 structures. Keva Planks are perfectly cut, identical construction blocks that stack with surprising stability, achieved by cutting the planks with great precision. They are about 1/4 inch thick, 3/4 inch wide and 4 1/2 inches long. You build structures by simply stacking the planks. No glue, no connectors. They can be stacked upright which looks like it would be as unstable as a house of cards, or stacked flat in squares, triangles, trapezoids--whatever. Younger kids can build walls, towers, and creative forms quickly and easily. Older kids can build more advanced designs like castles, bridges, or the Eiffel Tower. KEVA Palnks stimulate creativity, concentration, and imagination. They have broadest age range appeal of any toy we have ever seen. From preschoolers to architects, each person builds at his own skill level. KEVA Planks are the same size and shape as Kapla blocks and Citi Blocks and are fully compatible with each. This version of KEVA Planks is made in China from pine.