Based on a construction by Leonardo Da Vinci, little builders from the age of 8 years and up can build a self-supporting bridge or dome without glue, string or screws. All it takes is a little patience and sensitivity. Building set made of colored glazed lime wood, box oiled. Dimensions rods L 18 cm. imaginative building pleasure self-supporting bridge according to Leonardo da Vinci fine motor skills and tact Grimm's is a sustainable wood manufactory from southern Germany. Beautiful things as well as natural, high-quality and safe wooden toys are made from alder, lime, beech and maple wood. In the development of its products Grimm's is guided by Waldorf education, among other things. The products are unique and, with a few exceptions, are sanded and partly hand-painted by hand. With the reduced design of the wooden toys Grimm's wants to allow a lot of space for the development of children's creativity. The wood used comes from sustainable forestry in Europe. The production is designed to be as resource-saving as possible. For some products Grimm's cooperates with workshops for disabled people in Germany.