WEEKEND: Have a jolly 'oliday

No need to be sad that Halloween is over — you're invited to dress up for Sing-A-Long Mary Poppins. Arrive as your favorite character or in an outfit inspired by the 1964 film, and join other guests in the costume parade. A restored 35mm print has been customized with on-screen lyrics so you can sing along with Mary, Bert, and the other characters. Your host will introduce the film and guide you through audience participation activities that include a complimentary bag of props.

2 p.m. Friday-Sunday; 7 p.m. Saturday. $12.50, $10 under age 12. Regent Theatre, 7 Medford St., Arlington. 781-646-4849. regenttheatre.com