Dolphins protect humans when they’re in trouble. A California surfer was being attacked by a shark when a pod of dolphins encircled him until he made it to shore. Many people have been saved in the same way, and reports of dolphins rescuing humans.
potsherds for an archaeological dig--you have to ruin a terra cotta pot, but what fun! My kids accidentally smash enough plates on their own that I could probably just save one, then have them try to reassemble it with glue
Ancient Greece Unit: 15 engaging lessons to teach Ancient Greece