We moved out of CT a few years ago, so I don't know if this is still true, but there used to be coupons for the aquarium in the Entertainment book. Can't remember how much off, but enough to be worth it. I think the books are on sale this week too for $10 so it might be worth it.
We always enjoyed eating at Mystic Pizza when we went down. It' nothing real special, but the food is good, and there's lots of pictures from the movie on the walls.