Double rainbows are some of the most mesmerizing phenomena of the natural world. Hape's Double Rainbow Stacker can be mesmerizing as well with the limitless stacking possibilities the two shapes and nine colors provide. Should the shapes be stacked according to type, size, and color? Should we just go wild and impress Mom and Dad with whatever dazzling rainbow design comes to mind? Hape's Double Rainbow Stacker is constructed for lasting durability with high-quality Birch plywood, solid Maple, and a finishing of child-safe, water-based paint. For ages 12 months and up.