| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Backyard and Beyond: A Guide for Discovering the Outdoors | 978-1-55591-071-6 (1-55591-071-8) | 1992 |
| Talking to Fireflies, Shrinking the Moon: Nature Activities for All Ages | 978-1-55591-310-6 (1-55591-310-5) | 1997 |