Waterwave is really versatile and ideal already for small children. Toddlers stack, sort and build and as the children get older they will use it as fence for animals, like a tunnel for vehicles, as house for dwarfs and dollhouse dolls, build amazing sculptures. This toy will always be integrated in playing with a lot of fantasy. Materials: lime wood, non-toxic water-based colour stain. Includes 6 pieces. Medium Water Wave length is 22cm. Use soapy water with a damp cloth for cleaning.