Young learners can view the entire 21 day incubation period with this day-by-day exploration set. Children simply crack open the realistically detailed plastic eggs to reveal each development stage of a chick's life cycle. Set contains everything you need to teach and engage young children in this subject, including Activity Guide, Plastic Eggs and Storage Tray. Activity guide features useful definitions, chicken facts and a photocopiable sheet for children to label - all designed to extend the learning of this science-themed set. Eggs and storage tray are labelled to allow for self-checking and easy organisation. Eggs measure 70mm.