Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Writer | The Land Before Time | 1988 | |
| Writer | The Land Before Time X: The Great Longneck Migration | 2003 | |
| Writer | The Land Before Time II: The Great Valley Adventure | 1994 | |
| Writer | The Land Before Time III: The Time of the Great Giving | 1995 | |
| Producer | An American Tail | 1986 | |
| Writer | The Land Before Time IX: Journey to the Big Water | 2002 | |
| Writer | The Land Before Time IV: Journey Through the Mists | 1996 | |
| Writer | The Land Before Time VI: The Secret of Saurus Rock | 1998 | |
| Writer | The Land Before Time V: The Mysterious Island | 1997 | |
| Producer | The Land Before Time V: The Mysterious Island | 1997 | |
| Writer | Sesame Street Presents: Follow That Bird | 1985 | |
| Writer | Sesame Street: Elmo Saves Christmas | 1997 | |
| Writer | The Tale of Peter Rabbit | 1991 |