You've heard of building sand castles, but how about a sand skeleton?! Use this set of 15 child-life-sized molds to form your own skeleton on the beach or in your sand box. Pieces measure from 6 to 14 inches, and your skeleton will measure over 4 feet long when molded! Have the coolest sand structure on the beach or use the molds to practice naming bones at home in your sand box - skull, ribs and spine, pelvis, humerus, radius and ulna, hand, femur, tibia and fibula, and foot.