"Head, Shoulders, Knees, and Toes...Ribs and Bones!" Join in all the fun and complete this entertaining double challenge puzzle! You will learn all about the human body and its organs in no time! Around the outer frame, you'll find 20 puzzle pieces with various body parts on each piece. The frame will display the correct name of the body part, with arrows leading to the part of the body it belongs to. On the inner puzzle, you will find 15 traditional, interlocking pieces that make up the illustration of a boy and a girl. This educational puzzle comes complete with 35 pieces and is best suited for slightly younger children, ready to learn about the Human Body.