This season in the series finds"leaf gobblers" eating all of the vegetation in Great Valley, driving Littlefoot, the young brontosaurus, and the other dinosaur inhabitants out. Arguments break out among the adults during migration, and Littlefoot and his pals opt to take matters in their own hands by crossing on the"big water" into an unknown island. There they meet with an older friend from The Land Before Time II. Plenty of play in this , and as the show has been wont to do from the beginning, it shows critters as less than perfect.