Four layers of jigsaw puzzle respectively for the human body appearance human muscles human bones and human internal organs From puzzle to picture and symbol help children build abstract concepts. Finely polished to protect baby's delicate hands Manufacturered by . Develop hand eye coordination and improve hand muscle control. Strengthen children's understanding of human body structure and name Commitment: if you receive damaged goods or have any questions about the goods you can contact us first and we will definitely give you the most satisfactory solution Montessori science and culture teaching AIDS body structure puzzle suitable for children 3 years old and above.