- Littlest Raccoon (1961) (illustrated by Claude Humbert
- Let's Be Indians (1962) (illustrated by Arnold Lobel)
- My Little Golden Book of Manners (1962) (illustrated by Richard Scarry)
- Good Hunting Little Indian (1963) (illustrated by Leonard Weisgard)
- Re-released and revised in 1991 as Good Hunting, Blue Sky with illustrations by James Watts
- Willy Is My Brother (1963) (illustrated by Shirley Hughes)
- The Golden Calendar: 1966 (1966) (illustrated by Tibor Gergely)
- Let's Be Early Settlers with Daniel Boone (1967) (illustrated by Arnold Lobel)
- Ootah's Lucky Day (1970) (illustrated by Mamoru Funai)
- Dinosaur Time (1974) (illustrated by Arnold Lobel)
- Scruffy (illustrated by Kelly Oechsli) (1988)
Amelia Bedelia series
Illustrated by Wallace Tripp, Fritz Siebel, or Lynn Sweat:
- Amelia Bedelia (1963)
- Thank You, Amelia Bedelia (1964)
- Amelia Bedelia and the Surprise Shower (1966)
- Come Back, Amelia Bedelia (1971)
- Play Ball, Amelia Bedelia (1972)
- Good Work, Amelia Bedelia (1976)
- Teach Us, Amelia Bedelia (1977)
- Amelia Bedelia Helps Out (1979)
- Amelia Bedelia and the Baby (1981)
- Amelia Bedelia Goes Camping (1985)
- Merry Christmas, Amelia Bedelia (1986)
- Amelia Bedelia's Family Album (1988)
Liza, Bill & Jed Mysteries
- Clues in the Woods
- The Haunted House
- Key to the Treasure
- The Mystery of Hermit Dan
- Pirate Island Adventure
- The Ghosts of Cougar Island
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