Let's-Read-and-Find-Out Science, Stage 2 (1972–2018)
- Fossils Tell of Long Ago (1972)
- What Makes Day and Night? (1986)
- The Moon Seems to Change (1987)
- Digging Up Dinosaurs (1988)
- Your Skin and Mine (1991)
- Germs Make Me Sick! (1995)
- How Mountains Are Made (1995)
- An Octopus Is Amazing (1996)
- How Do Birds Find Their Way? (1996)
- What Makes a Magnet? (1996)
- Day Light, Night Light (1998)
- The Planets in Our Solar System (1998)
- Flash, Crash, Rumble, and Roll (1999)
- Feel the Wind (2000)
- Follow the Water from Brook to Ocean (2000)
- Hear Your Heart (2000)
- Why Frogs Are Wet (2000)
- Why I Sneeze, Shiver, Hiccup, Yawn (2000)
- The Sun (2002)
- How People Learned to Fly (2007)
- Life in a Coral Reef (2009)
- What Happens to Our Trash? (2012)
- Running on Sunshine (2018)