Age 5+ hold these life-size human x-rays up to the light or use them on a light table and see every authentic detail of a real skeleton. Arrange the 18 pieces together to reproduce the entire body of a young adult 5' (1.5 m) tall. The teacher guide includes reproducible artwork and information on radiography. 18 pieces - (1.5 m) tall - 18 pieces - life-size human x-rays