In addition to the "Eloise" series, Thompson also wrote and illustrated several other children's books, including:
- The Ordinary Princess (1963)
- The Spooky Tail of Prewitt Peacock (1963)
- The Biggest Present (1963)
- Mr. Turtle's Magic Glasses (1963)
- Miss Tizzy (1964)
- The Great Crocodile (1965)
- Big Little Davy (1966)
- Henry and the Paper Route (1967)
- Miss Lollipop's Lion (1967)
- The Great Blue Lobster (1968)
- The Jolly Jungler (1969)
- The Swamp Monster (1971)
- Willy Wonka and the Chocolate Factory (1971)
Thompson's work is known for its humor, wit, and charm, and she has been praised for her ability to capture the imagination of children. Her books have been enjoyed by generations of readers and continue to be popular today.