Learning Resources Skill Builders! Human Body Activity Set. Explore the names, functions, and locations of organs, systems, and more with age-appropriate body and biology activities. Includes 3D figure with snap-on illustrated body systems, a magic x-ray reader, reusable stickers, and a 24-page write-and-wipe activity book about the human body. Features multilingual packaging. X-ray reader measures 15cm L x 12cm H.17 Piece Set (Ages 4+)