Having gone from being a dot in an egg to tadpole and beyond, Frog is happy to tell Oscar about the ways he changed as he grew. Curious Oscar - he is a kitten, after all - wants to know more, so Frog describes to him how plants, fish, bugs, birds, and cats, like Oscar himself, develop from seed or egg to full-grown. Simple, colorful illustrations enliven this 28-page book, and an index guides readers to topics such as hatching, sprouting, mothers, and growing bigger.