Our fascinating cards give children an inside look at the skeletal systems of the animal kingdom! Kids simply select a card to study an illustrated skeleton…then pull the tab to reveal a full-color photograph of the animal it belongs to—with the skeleton visible right on top. Set includes 20 cards color-coded into 4 categories—farm animals, wild animals, pets and ocean life—plus a guide. Cards measure 4 3/4" x 7 1/2".