No incubator required. Now, students can see the day-by-day development of a chick by cracking open this set of 21 eggs. Eggs 1?20 contain realistic illustrations. Final egg opens to reveal a plastic 3-D chick. Perfect for teaching the chick life cycle and related vocabulary in life science lessons. Multilingual Activity Guide includes definitions, chicken facts and a blackline master to label. Eggs and plastic storage tray are labeled for self-checking and easy organization. Durable plastic eggs measure 2-3/4 ?L each. For grades K and above.