These rainbows are made by Grimms Spiel & Holz who have been making wooden toys since the 1970's! This wooden stacking rainbow is a great versatile toy, representing the element of air. The rainbow tunnel can be used as a bridge, tunnel, fence or small house. A single piece can also be used as a seesaw. Or as a cave for small dwarves. Recommended by "Play Good". Alder, 6-pieces. Coloured with non toxic water based dyes. Complies with all safety standards. Medium size measuring 17cm x 9cm x 6cm Also available in Small and Large.