Known For
An American Tail
(1986)
Story and Screenplay
The Land Before Time III: The Time of the Great Giving
(1995)
Characters
The Land Before Time
(1988)
Story
The Land Before Time VI: The Secret of Saurus Rock
(1998)
Characters
The Land Before Time X: The Great Longneck Migration
(2003)
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
The Land Before Time IX: Journey to Big Water
(2002)
Characters
The Land Before Time II: The Great Valley Adventure
(1994)
Characters
The Land Before Time V: The Mysterious Island
(1997)
Characters
Follow That Bird
(1985)
Writer
The Land Before Time IV: Journey Through the Mists
(1996)
Characters
The Land Before Time VII: The Stone of Cold Fire
(2000)
Characters
The Land Before Time XIV: Journey of the Brave
(2016)
Characters
The Land Before Time XI: Invasion of the Tinysauruses
(2005)
Characters
The Land Before Time VIII: The Big Freeze
(2001)
Characters
Full Filmography
Writing
Follow That Bird
(1985)
Writer
Sesame Street: Sleepytime Songs & Stories
(1986)
Writers' Assistant
An American Tail
(1986)
Story and Screenplay
The Land Before Time
(1988)
Story
The Land Before Time II: The Great Valley Adventure
(1994)
Characters
The Land Before Time III: The Time of the Great Giving
(1995)
Characters
The Land Before Time IV: Journey Through the Mists
(1996)
Characters
The Land Before Time V: The Mysterious Island
(1997)
Characters
The Land Before Time VI: The Secret of Saurus Rock
(1998)
Characters
The Best of Kermit on Sesame Street
(1998)
Writer
The Land Before Time VII: The Stone of Cold Fire
(2000)
Characters
The Land Before Time VIII: The Big Freeze
(2001)
Characters
Sesame Street: Elmo's World: Springtime Fun!
(2002)
Writer
Sesame Street: Elmo Visits the Firehouse
(2002)
Writer
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
Sesame Street: Elmo's World: What Makes You Happy?
(2007)
Writer
The Land Before Time XIII: The Wisdom of Friends
(2007)
Characters
Sesame Street: Elmo's World: Opposites
(2008)
Writer
Sesame Street: Elmo's World: Let's Play Music
(2010)
Writer
Sesame Street: Elmo's World: All about Faces
(2010)
Writer
The Land Before Time XIV: Journey of the Brave
(2016)
Characters