Demonstrate basic anatomical features of the human skeleton using this 17″ excellent Skeleton Model. The skeleton has natural movement of the joints with the exception of fused carpals and tarsals. Constructed of rugged plastic with a heavy metal base for an extra measure of stability. Features include unbreakable ribs, stainless steel screws, brackets and springs to resist corrosion. Comes with a detailed key. Ages 7+. Recommended age 7+ years