Nelly looks fabulous in her new swimsuit, so she wears it all the time--while riding her bike, playing basketball, eating at a fancy restaurant . . . even while sleeping.

But Nelly refuses to wear it for swimming. Grandma, a swimming champion, has other ideas. Finally Nelly, dipping one toe at a time, learns to float, blow bubbles, kick . . . and is on her way to becoming a champion swimmer herself!