| title | ISBN-13 | year of publication |
|---|---|---|
| Base+ball=baseball | 978-1-59197-430-7 | 2003 |
| Do Something in Your City | 978-1-59197-571-7 | 2004 |
| Do Something in Your State | 978-1-59197-575-5 | 2004 |
| Ock as in Block | 978-1-59197-250-1 | 2003 |
| Rain+bow=rainbow | 978-1-59197-436-9 | 2003 |