2 years & up. Bring a variety of different creatures to life with the world's first 3-D flash cards! The back of the cards feature fun animal facts in English and French. Re-closable rings each group of cards together for on-the-go learning. No 3-D glasses needed. Made from durable, easy to clean plastic (wipe off with moist cloth). Purchase all 3 different types together as a set or buy individually. Each set of flash cards contain 20 cards each.