This natural, wooden tunnel is an open ended resource which will inspire creativity and imagination. Perfect for us in min world play and in creative construction. Children can balance and stack these 6, wooden pieces, developing hand eye co-ordination and fine motor skills. These tunnels can also be used on a lightbox, or as scenery for block play. Set contains 6 wooden pieces, the longest being 18cm. Grimms educational resources are made from wood that is only sourced from sustainably managed forests in Europe. They are made from alder, lime, beech and maple. The woode is coloured with non toxic dyes and oils. For cleaning Grimms products, use a dampl cloth only, do not submerge in water or use disinfectant. The Grimms uses different types of wood in their resources as wood is robust, aesthetically beautiful, it tells the story of nature and life, it can be recycled, it has a warm and vivid sound, and through the smell of wood, you can feel its originality, clarity and sincerity.