The smallest of the Grimm's rainbows and one part of the four elements, this rainbow fits in the palm of your hand. This rainbow inspires creativity, as the arches can be used as tunnels, little houses, or rocking chairs for tiny dolls. The 6 pieces nested measure approximately 4" wide x 2." high x 1.5" deep. Children love to nest or stack the colorful, unusual blocks, or use as an open-ended toy in imaginative play. Best for ages 3 years and older.