Last weekend we took a trip up to Boothbay to visit the Maine State Aquarium for the 2nd time. We made sure it was actually open this time! Eliot loved it. He was enamored with the shark touch tank. There was a Cat Shark and Spiny Dogfish. He touched and pet the sharks then took a spin around, then came back on and off for 2 hours. He wanted to jump in and swim with the sharks. He was certainly more brave than most of the adults there.
They have a very active volunteer program that involves kids starting at about 5-6 along with a parent. If Eliot keeps interested in under sea creatures I think it would be a place to learn.