Allow the groups to manipulate their structures and make changes as needed. I allowed kids to exchange products for other products when necessary, but that is up to you. When the children have what they think is the best possible structure to protect their egg, give them an egg to add to the project.
If you have access to a balcony take the children to the balcony. If you do not, take the structures to a designated spot on the roof and have a coworker gather the children in a safe area below the drop site. Take the structures one at a time and drop them from the roof. Allow time to build anticipation with a 3…..2…..1…..Drop! Count.
Have your coworker check the eggs in the structures below to see if the eggs survived. If an egg survived that group can have bragging rights until the activity again a year from now.