| Movie | 1986 | An American Tail | Producer | Production |
| Movie | 2000 | The Land Before Time VII: The Stone of Cold Fire | Characters | Writing |
| Movie | 2003 | The Land Before Time X: The Great Longneck Migration | Characters | Writing |
| Movie | 2002 | The Land Before Time IX: Journey to Big Water | Characters | Writing |
| Movie | 1985 | Follow That Bird | Writer | Writing |
| Movie | 1999 | CinderElmo | Writer | Writing |
| Movie | 1998 | The Land Before Time VI: The Secret of Saurus Rock | Characters | Writing |
| Movie | 2004 | Sesame Street: Elmo's World: Families, Mail & Bath Time! | Writer | Writing |
| Movie | 1998 | The Best of Kermit on Sesame Street | Writer | Writing |
| Movie | 2006 | The Land Before Time XII: The Great Day of the Flyers | Characters | Writing |
| Movie | 2007 | The Land Before Time XIII: The Wisdom of Friends | Characters | Writing |
| Movie | 2016 | The Land Before Time XIV: Journey of the Brave | Characters | Writing |
| Movie | 2004 | Sesame Street: Elmo's World: The Street We Live On! | Writer | Writing |
| Movie | 1997 | Sesame Street: Elmo Says BOO! | Songs | Sound |
| Movie | 1988 | The Land Before Time | Story | Writing |
| Movie | 1994 | The Land Before Time II: The Great Valley Adventure | Characters | Writing |
| Movie | 1995 | The Land Before Time III: The Time of the Great Giving | Characters | Writing |
| Movie | 1996 | The Land Before Time IV: Journey Through the Mists | Characters | Writing |
| Movie | 1997 | The Land Before Time V: The Mysterious Island | Characters | Writing |
| Movie | 1997 | The Land Before Time V: The Mysterious Island | Producer | Production |
| Movie | 1990 | Sesame Street: Rock & Roll! | Writer | Writing |
| Movie | 2010 | Sesame Street: Elmo's World: All about Faces | Writer | Writing |
| Movie | 1991 | The Tale of Peter Rabbit | Writer | Writing |
| Movie | 1983 | Don't Eat the Pictures: Sesame Street at the Metropolitan Museum of Art | Writer | Writing |
| Movie | 1983 | Don't Eat the Pictures: Sesame Street at the Metropolitan Museum of Art | Producer | Production |
| Movie | 1996 | Sesame Street: Do the Alphabet | Music | Sound |
| Movie | 2001 | The Land Before Time VIII: The Big Freeze | Characters | Writing |
| Movie | 2005 | The Land Before Time XI: Invasion of the Tinysauruses | Characters | Writing |
| Movie | 1996 | Sesame Street: Elmo Saves Christmas | Writer | Writing |
| Movie | 1988 | Sesame Street: Put Down the Duckie | Writer | Writing |
| Movie | 1986 | An American Tail | Screenplay | Writing |
| Movie | 1986 | An American Tail | Story | Writing |
| Movie | 1997 | Sesame Street: Quiet Time | Writer | Writing |
| Movie | 1997 | Sesame Street: Quiet Time | Songs | Sound |
| Movie | 2004 | Sesame Street: A Celebration of Me, Grover | Writer | Writing |
| Movie | 1990 | Sesame Street Home Video Visits the Hospital | Writer | Writing |
| Movie | 1990 | Sesame Street Home Video Visits the Firehouse | Writer | Writing |
| Movie | 1983 | Don't Eat the Pictures: Sesame Street at the Metropolitan Museum of Art | Music | Sound |
| Movie | 1990 | Sesame Street: Sing Yourself Silly! | Writer | Writing |
| Movie | 1990 | Sesame Street: Dance Along! | Writer | Writing |
| Movie | 2009 | Sesame Street: Elmo and the Bookaneers: Pirates Who Love to Read! | Original Music Composer | Sound |
| Movie | 2006 | A Sesame Street Christmas Carol | Writer | Writing |
| Movie | 1988 | Big Bird in Japan | Original Music Composer | Sound |
| Movie | 2011 | Sesame Street: Wild Words and Outdoor Adventures | Original Music Composer | Sound |
| Movie | 2012 | Sesame Street: Elmo's Magic Numbers | Original Music Composer | Sound |
| TV Show | 1969 | Sesame Street | Writer | Writing |
| TV Show | 1976 | Ball Four | Writer | Writing |
| TV Show | 1975 | When Things Were Rotten | Writer | Writing |
| TV Show | 2007 | The Land Before Time | Creator | Creator |
| TV Show | N/A | Super Mario Galaxy | Creator | Creator |
