Children Organs Puzzles: Let your children explore the fun of the human body, explore the bones, breathing, digestion and muscle systems through 5 layers of wooden puzzles. Kids can promote their physical positivity and self-confidence through correct anatomical drawings which are child-friendly. Kids will love to assemble this body parts puzzle time and time again. It is durable, also has smooth rounded edges to improve security. Children are born with a curiosity to learn and explore. Therefore, we focus on making interactive toys and encourage them to have fun while developing important life skills. By finding the right place to place each part, building layer by layer. The notches on the side allow children to grasp and remove individual parts to correct small mistakes. Content : 4 layers, each type with a total of 28 pieces,7 pieces per layer.