A fun park to visit through December weekends before Christmas is Santa's Village in Jefferson, NH. It is a small theme park with a great atmosphere that is especially effective in the snow. There are lots of Christmas lights and music throughout the village which is beautiful to stroll at night. Many rides are open during Christmastime including the ferris wheel, bumper cars, Skyway Sleigh (monorail), S.S. Peppermint Twist (rockin' tug boat), Humbug Adventure (Sally Dark Ride), antique cars, reindeer carousel, the train, and many more.
There are many indoor restaurants and shops, a live stage show, and a 3-D movie. Santa's Village is not a major theme park, but it is a very nicely kept family park in the White Mountains of Northern New Hampshire. It is a beautiful drive to get there and worth the trip for a Christmas family event.