Let's-Read-and-Find-Out Science, Stage 1 (1991–2008)
- Fireflies in the Night (1991)
- Baby Whales Drink Milk (1994)
- Where Are the Night Animals? (1998)
- Snow Is Falling (2000)
- A Tree Is a Plant (2001)
- Bugs Are Insects (2001)
- I'm Growing! (2001)
- Where Do Chicks Come From? (2005)
- Clouds (2008)