Ideas for 4 days....from NH
 

I have Labor Day weekend off and I'm trying to figure out where to take my 8&9 year old boys. We'd be driving or flying from Manchester NH. No beach trips...we do that all summer. I'd like to stay for less than $200 per night. We already did an expensive trip this year (9 days in Italy).

We've been to NYC, DC, Disney, Acadia, Philly, Puerto Rico.

We like to be active...hiking, rafting, ziplining. They also enjoy living history and museums.

Where would you go?

Niagara Falls is perfect... Old Fort Niagara, Whirlpool JetBoats, Niagara Zipline, Maid of the Mist, fireworks, hiking the Gorge, there are 5 waterparks including Great Wolf Lodge, plenty to see and do for that age...

Niagara is actually on my short list. Thanks for bumping it up!

Vermont, I'd go somewhere in Vermont or upstate New York.