The only thing Tuck doesn't like about swimming lessons is the water. He worries that water might get in his ears and feel awful. Or it might get in his eyes! "You'll get used to that," says his mom. "Your eyes are waterproof," says his swim teacher. "I'm not going swimming," says Tuck. So no one is more surprised than Tuck when he heroically takes the plunge--and finds out he can get into the swim of things after all.