Very educational and fun for my son who is preschool age. We were lucky enough to have all caterpillars come alive and survive all the way through. They started off super tiny and grew into huge fuzzy caterpillars before cocooning and emerging as beautiful butterflies. My son loved to feed them with the pipette and watch them move around until they could flutter. On his 4th Birthday, a week or so after they all emerged, we were able to release them with his friends and family. We did have one whose wings were busted, so we left him on a flower petal by the door.