Calling all Massachusetts Bandsters!!!

Hey there all you banisters out East -I'm heading your way for a family vacation and I'm looking for some down home help... What to do & see - not as a tourist but something cool and interesting - its my 5th time going to you're awesome State but hubby and the kids 1st -they already have Fenway tickets and I will shop or do my own thing. We're staying in Salem (cause my friend lives there and witches are cool) but she is kidless and she gave me a list of places to party when I asked for stuff to do. So any boy child friendly fun ages 12&7 suggestions would be terrific. Also trying to do a different 'Cape' other than Cape Cod -whale watching etc. Plus if any of you are in the vicinity I would love to meet you for tea (since its Boston lol!) I thank you in advance!!!