“A Sleeping Beauty Christmas,” 3 p.m. Dec. 15 at the Mainstage, is an original musical based on the classic fairytale, complete with a holiday twist. The King and Queen throw a huge Christmas party to celebrate the birth of their daughter. But they forget to invite the land’s most powerful sorceress, and a dark spell is cast over the palace. Don’t worry, the kingdom comes back to life in this journey of love and hope. It truly is a magical holiday show. Tickets start at $12 for adults, $7.49 for kids.