3-Layer wooden puzzle that shows the life cycle of a frog. Bottom Layer: A frog has laid eggs at the bottom of a lake. A tiny tadpole is growing inside each small egg. Middle Layer: After the tadpoles have hatched, their front and back legs begin to grow. Top Layer: Now the frog is almost as big as the water lily on which he is sitting. Puzzle is packaged in a sturdy cardboard box . Each puzzle is approx.61/4 x 61/4". Suitable for 3+.