Mill Brook Gallery and Sculpture Garden is celebrating its 19th annual outdoor sculpture exhibit with a garden party on Sunday. You can meet the sculptors, which there are 25 of, and discuss the pieces that have been created in bronze, welded aluminum, carved marble, corten steel and resins. You’ll probably be just as amazed with the work as we were when we stopped in for a sneak peek last week. The party is free and open to the public, and will be held from 2 to 4 p.m. The exhibit will be up all summer, through Oct. 23, so you have plenty of time to stroll around and see what’s around the Mill Brook grounds, but how can you say no to a garden party?