Where to vacation in New England?

I am from Maine and have been here my whole life. I have been to North Conway in NH and to Santa's Village and Storyland there. I Have been to the Aquarium and Museum of Science in Boston. My family and I are looking to go somewhere new this summer here in New England. We want to keep the traveling down but were wondering what is out there that we may not be aware of that would be fun for a 10 and 12 year old to do that would be fun. Any Ideas?