As youngsters transform from aquarium worker to dolphin trainers, imaginative play includes questions (and fascinating answers) about the environment and conversation. Although it's difficult to single out the best feature in this fully equipped set, the undisputed standout among testers was that the dolphin tank truly does hold water. With delightfully detailed props from the seagulls waiting to scoop up any forgotten food, to the crane that hoists the ball for the dolphins to tap as they perform for visitors, to the watch on the dolphin trainer, the learning is playful and elaborate.