In this first of many sequels, "Land Before Time II: The Great Vally Adventure" continues the saga of Littlefoot (Scott McAfee) and friends. In the Great Valley, he and his pals disobey their folks and end up mired in quicksand, necessitating parental intervention. Deciding to run away with Cera (Candace Hutson), they become witnesses to an egg-napping by Ozzy and Strut, who have robbed Ducky's (Heather Hogan) nest. In hot pursuit, they cause a landslide, resulting in the egg being deposited - unbeknownst to them - back in its nest in one piece. Looking for the lost egg, they end up in the Mysterious Beyond, where Ducky mistakes another egg for her own. Now with two eggs in her nest, they decide to go ahead and wait for the mystery egg to hatch. They are shocked when the hatchling turns out to be a sharptooth, who gets the name Chomper (Rob Paulsen). Eventually there is a dramatic encounter with Chomper's lost parents.