A Mercer Island tradition! Gather with your family, friends and neighbors for an evening of holiday merriment at the community tree lighting ceremony and caroling at Mercerdale Park. Disney Radio will also be there with a fun holiday music performance! Santa photos, treats and children’s entertainment will follow at the Firehouse. Bring an unwrapped toy for the Toys for Tots drive. Entertainment will start at Mercerdale at 6pm and the tree will light at 6:30pm.