Nature and Animals:
* The Wonderful World of Insects (1958)
* The Animal Book (1961)
* The Complete Book of Snakes (1968)
* The Complete Book of Birds (1972)
* The Complete Book of Horses (1975)
* The Complete Book of Seashells (1976)
* The Complete Book of Whales (1978)
* The Complete Book of Dogs (1979)
* The Complete Book of Cats (1980)
Fiction:
* The Little Red Hen (1944)
* The Curious Little Kitten (1956)
* The Tiny Turtle (1960)
* The Best Friends (1963)
* The Happy Little House (1965)
Non-fiction:
* The Story of the Alphabet (1959)
* The Story of the Calendar (1960)
* The Story of Money (1962)
* The Story of Time (1963)
This is just a partial list of her works. She wrote many other books, including several on art and design. Her books are known for their clear, informative text and beautiful illustrations, making them engaging and educational for children.