• Wood and metal
• tool--can cultivate problem-solving skills, creative thinking skills and teamwork spirit, tools
• --cultivate brain development, coordination and self-confidence conducive to exercise cognitive ability, ability and learning ability, manipulative
• --babies can quickly know through the screw shape and in the right place, helping them to recognize different things, tool
• tool --the surface, edges and corners are finely polished, without burrs, and will not hurt hands, tools
• Interactive --it can help recognize different colors and be curious about our real world,