‘Tis two weeks before Christmas and all through the city, members of the Colorado Symphony Orchestra are getting ready. Grammy Award-winning conductor Richard Kaufman opens his music, and the CSO chorus warms their voices, so that when they join the Colorado Children’s Chorale and actor Gavin MacLeod (The Mary Tyler Moore Show, The Love Boat) for their 25th-annual show, no one is sleeping, not even a mouse.

Fri 7:30 p.m.; Sat-Sun 2:30 p.m., 6 p.m. Boettcher Concert Hall, 1000 14th St., $15-$73, 303-623-7876, official website