The Halloween celebration gives kids a chance to trick-or-treat indoors, getting candy at "pumpkin patches", which are tables sponsored by local businesses.
All of the proceeds from Sunday's event at the Shriner's building in Bangor go to UCP of Maine. UCP provides services and care for Mainers with physical and intellectual needs.
"We do this event because not many people know who we are or what we do," said Andrew Lohman, the marketing and community relations manager for UCP of Maine. "It's the way that we get out into the community the most throughout the year."
The first hour of the event, the lights were on and music turned down low to provide a sensory friendly environment for the kids UCP serves.
Organizers said they expected up to 4,000 people to come through Sunday's event, which was sponsored by Van Syckle Kia.
"It's so much fun for all the kids," said Cami Roe, a service advisor for Van Syckle Kia who was giving out candy. She said it's great, "seeing everyone come together as a whole, and support each other in a warm, safe environment."
One woman, Miranda Snowdon, at the event with little kids said it's a good idea to be "trick or treating indoors on a cold, windy day like today."
This year's theme was "Heroes Unite", and kids and parents were encouraged to dress up as their favorite superhero.
The kids our news team spoke with said they were excited to take pictures with people dressed as their favorite superhero, and of course, get as much candy as possible.
UCP of Maine staff said 26 local businesses participated in giving out candy Sunday, the most they've ever had. And the good cause behind all the fun keeps people coming back every year.
Organizers said Uno's restaurant in Bangor will be having a fundraiser all day Monday to benefit UCP of Maine. They said 20 percent of sales will go to UCP, as long as the customer presents a flyer. Those flyers can be found on UCP of Maine's Facebook page.