Humpty Dumpty is the perfect character to analyze for a scientific craft. Humpty fell of a wall and had a great fall, but you can create a different future for one of the eggs that you have in your fridge by having your kids create parachutes or coverings for an egg that can then be dropped from a significant height. Encourage them to create whatever they think will protect the egg best. Use hard boiled eggs to reduce clean up time later and let the eggs fly. When all the eggs are retrieved, try to glue the shells back on the ones that were broken and then decorate the egg shell to look more like Humpty Dumpty would.