The incredible inner workings of the human body are beautifully portrayed in this double-sided educational floor puzzle. One side of this 100-piece cardboard puzzle features the skeletal structure, and the other side shows internal organs and the circulatory system. Four feet long when assembled, the 100 cardboard pieces are extra-thick for increased durability. Its easy-clean surface keeps puzzle looking new. Children will be fascinated by this challenging, kid-sized floor puzzle. Dimensions: 48"L x 18"W. Manufactured by Melissa & Doug. Ages 8+