Known For
An American Tail
(1986)
Story and Screenplay
The Land Before Time XII: The Great Day of the Flyers
(2006)
Characters
The Land Before Time II: The Great Valley Adventure
(1994)
Characters
The Land Before Time
(1988)
Story
The Land Before Time III: The Time of the Great Giving
(1995)
Characters
The Land Before Time VI: The Secret of Saurus Rock
(1998)
Characters
The Land Before Time XIV: Journey of the Brave
(2016)
Characters
The Land Before Time V: The Mysterious Island
(1997)
Characters
The Land Before Time IV: Journey Through the Mists
(1996)
Characters
Follow That Bird
(1985)
Writer
The Land Before Time VIII: The Big Freeze
(2001)
Characters
The Land Before Time X: The Great Longneck Migration
(2003)
Characters
The Land Before Time XIII: The Wisdom of Friends
(2007)
Characters
The Land Before Time VII: The Stone of Cold Fire
(2000)
Characters
The Land Before Time IX: Journey to Big Water
(2002)
Characters
The Land Before Time XI: Invasion of the Tinysauruses
(2005)
Characters
Full Filmography
Writing
Don't Eat the Pictures: Sesame Street at the Metropolitan Museum of Art
(1983)
Writer
Follow That Bird
(1985)
Writer
An American Tail
(1986)
Story and Screenplay
Sesame Street: Put Down the Duckie: An All-Star Musical Special
(1988)
Writer
The Land Before Time
(1988)
Story
Sesame Street: Rock & Roll!
(1990)
Writer
The Tale of Peter Rabbit
(1991)
Writer
The Land Before Time II: The Great Valley Adventure
(1994)
Characters
The Land Before Time III: The Time of the Great Giving
(1995)
Characters
Sesame Street: Elmo Saves Christmas
(1996)
Writer
The Land Before Time IV: Journey Through the Mists
(1996)
Characters
The Land Before Time V: The Mysterious Island
(1997)
Characters
Sesame Street: Quiet Time
(1997)
Writer
The Land Before Time VI: The Secret of Saurus Rock
(1998)
Characters
The Best of Kermit on Sesame Street
(1998)
Writer
CinderElmo
(1999)
Writer
The Land Before Time VII: The Stone of Cold Fire
(2000)
Characters
The Land Before Time VIII: The Big Freeze
(2001)
Characters
The Land Before Time IX: Journey to Big Water
(2002)
Characters
The Land Before Time X: The Great Longneck Migration
(2003)
Characters
Sesame Street: Elmo's World: Families, Mail & Bath Time!
(2004)
Writer
Sesame Street: Elmo's World: The Street We Live On!
(2004)
Writer
The Land Before Time XI: Invasion of the Tinysauruses
(2005)
Characters
The Land Before Time XII: The Great Day of the Flyers
(2006)
Characters
The Land Before Time XIII: The Wisdom of Friends
(2007)
Characters
Sesame Street: Elmo's World: All about Faces
(2010)
Writer
The Land Before Time XIV: Journey of the Brave
(2016)
Characters
Production
Don't Eat the Pictures: Sesame Street at the Metropolitan Museum of Art
(1983)
Producer
An American Tail
(1986)
Producer
The Land Before Time V: The Mysterious Island
(1997)
Producer
Sound