Spark a child's imagination with this wonderful Guidecraft Stacking Rainbow Pyramid. Many shapes and designs are possible by stacking these squares in different ways, some that reveal colors and some which make interesting pyramid shapes. Stack them upside down for a new look, or side-to-side to reveal the full rainbows of colors. These are made from durable hardwood. There are six of them in increasing sizes so they fit one inside the other one and make a nice design when used all together. In the center of each square is one of the rainbow colors made by an inset of durable plexiglass, which is safe for play. The corners are rounded so there are no sharp edges. Best of all, the combinations of possible designs and colors keep kids interested and inventive when making different constructions. The wonderful product also comes with FREE Shipping. All that is needed is a strong imagination and the pyramid fun abounds.