The SPCA's "Puppy Plunge" takes place from noon to 4 p.m. at the YMCA's Camp Letts in Edgewater. There will be food, music, canoeing, vendors, games, contests, children's activities and live music by the Biondi Brothers and the School of Rock. Dogs can compete in the "Ugly Dog" and the "Doggy Bikini" contests. They are also encouraged to take a plunge in the water, which will be held every hour. Tickets are $5; free for children younger than 10 (and dogs). To purchase tickets and more information, call 410-268-4388, ext. 142.