Set includes 23 building blocks in wooden frame. Materials: lime wood, non-toxic water-based colour stain and non-toxic plant-based oil finish. Size: frame length 44.5 cm and single blocks are a 4 cm thickness. With the exceptional shapes of the building blocks, children can create caves, mountains and landscapes or decorate castles and palaces. While bulding the children train the fine motor skills and logical and spatial thinking. Ages 3+ . Note: Use soapy water with a damp cloth for cleaning. Dry immediately. Please do not submerge in water and do NOT use disinfectant or hot water.