DVD box set contains the first 11 films in Land Before Time series:

The Land Before Time
The Land Before Time II: The Great Valley Adventure
The Land Before Time III: The Time of the Great Giving
The Land Before Time IV: Journey Through the Mists
The Land Before Time V: The Mysterious Island
The Land Before Time VI: The Secret of Saurus Rock
The Land Before Time VII: The Stone of Cold Fire
The Land Before Time VIII: The Big Freeze 
The Land Before Time IX: Journey to Big Water
The Land Before …