Gecko Blocks, a brand new construction toy made of colorful foam blocks that magically cling to each other. A set of 28 lightweight foam blocks coated with a unique, non-toxic, silicone adhesive. They’ll stick to each other, glass, and they work great on the shower wall or in the bathtub! Build and imagine like never before - build up-ways, side-ways, and any whichaway! Easy to clean and they never lose their stickiness. Simply run the blocks under a tap to remove any debris and they stick like new.