Kids in costume can go trick-or-treating at Stew Leonard’s, 3475 Berlin Turnpike, in Newington on Tuesday, Oct. 29, from 4 to 5 p.m. and have photos taken with store mascots. (Bring your own bag. Each department in the store will have a candy station.) On Halloween, children in costume get a free small ice cream cone. Information: 860-760-8100.