This small, hands-on aquarium in Fisherman's Wharf is the perfect place to bring the kids for a quick education in the types of wildlife that live in San Francisco's Bay. The exhibits include a touch pool with manta rays, a great collection of jellyfish, and the walk-through glass tunnel, where you'll be surrounded on all sides by a variety of sharks. Outside is a free play area where kids can build crafts and play with fish-themed toys. Tickets are $19.95 for adults, $11.95 for children. Open 10 am to 7 pm excluding holidays, check website for details.