One of the most welcome harbingers of winter in Boston is the seasonal re-opening of the Frog Pond Ice Skating Rink at Boston Common. Beginning in mid-to-late November, this family-friendly attraction at America’s oldest public park welcomes gliders of all levels for a low admission price—or even for free if your little one is under 58 inches tall. Skate rentals are also available, while the Frog Pond Café tempts skaters and non-skaters alike with warming treats. If you’re more inclined to sit back and watch the experts spin about the sheet, then check out the annual ice show put on by The Skating Club of Boston, which occurs November 29 from 5–6 p.m. And that’s only a warm-up: Boston Mayor Marty Walsh presides over the city’s official tree lighting nearby following the frozen festivities, after which skating resumes until 10 p.m.