Great Lake Swimmers (of Toronto) and The Giving Tree Band (of Yorkville, Ill., US) will be performing at the Sandwich Opera House in Sandwich, Ill. next Tuesday, Oct. 27. Doors open at 7 p.m., show starts at 8 p.m. Tickets can be purchased at the opera house box office or at the door and are $15. It is an all-ages show. The Sandwich Opera House is located at 140 E. Railroad St. in Sandwich, Ill.