Hi Shelly,
The Chip & Dale Campfire Sing-a-long at Fort Wilderness Campground is so much fun! You can also roast s'mores and catch an outdoor movie at this event.
Some other Disney resorts also offer movies under the stars, or pool-side, and some kick it up a notch with the campfire and s'mores as well. Check with your Resort Concierge or Front Desk for more information and a schedule of these events/locations when you check in.
Another fun evening that doesn't require a ticket is a "Yeeha Bob" Piano Singalong at the River Roost Lounge at Disney's Port Orleans Riverside Resort. It's wonderful and entertaining family fun that gets the whole crowd involved!
Guests of the Animal Kingdom Lodge may be able to use night vision goggles to watch the savannas come alive at night! This is usually offered between 8:30 and 11:00 p.m. when available. Check the AKL's Guest Activity Calendar for specific times and locations.
One of my favorite events of all time is the
Pirates and Pals Fireworks Voyage, which departs from the Contemporary Resort on selected nights. There is a charge for this event, but it is fabulous!
This is not a complete list, but I hope it helps get you started! Have a magical time!