Grimm's | Stacking Water Waves LargeGrimms large wooden water is a stacking puzzle in several shades of blue, representing the element of water. A beautiful open ended building set and versatile enough for small children and preschoolers, stack, sort and build. As the children get older it can be used in imaginary play, as a fence for animals, a tunnel for vehicles, as a house for dwarfs and dollhouse dolls or to build amazing sculptures. Of course it makes for a beautiful water piece