Avocado Baby (Red Fox picture books)

The Hargraves, a kind but scrawny family, want their new baby to grow up big and strong. But the tiny tyke will hardly eat a thing. One day, Mrs. Hargraves finds an avocado in the fruit bowl, and the infant gobbles it up. But then, the strangest things begin to happen as the baby develops superhuman strength. Just the book for picky eaters.