A water park for children, the Centro Internacional para Convivencia Infantil, fondly known as CiCi, has dolphin shows, a freshwater pool with a wave machine, a waterslide, the Sky Coaster (a safe, low-key bungee jump for kids), and other attractions. If you book an hour-long swim with the dolphins, CiCi can have you picked up at your hotel. It's easy to catch a cab for the return trip.
Av. Costera Miguel Alemán, next to Planet Hollywood, Acapulco, Guerrero, 39850, Mexico