The third annual Trick-or-Treat on Main Street is set for 4:30-7:30 p.m. Thursday in downtown Princeton.

Organizations within the community will be up booths for children to come get candy. A photo booth will also be set up for families.

Sections of Main Street will be shut down during the event. Emergency personel will be on hand for safety and to allow children to see ambulances, fire trucks and police cars.

The event is free and open to the public.