リトルフット ムーサウルスを救え！

音楽が大好きなキンカジューのビーボ。大切な人の愛の歌を届け、その運命を全うすると心に決めたビーボを待っていたのは、忘れられない大冒険の旅だった!

池の中に浮かぶ島、アント・アイランドには主にアリたちが暮らしていた。夏になると島にバッタたちがやってきて、秋までの間にアリたちに食料を集めさせる仕事をさせていた。まるで農民たちに年貢を納めさせるかのように。奇抜な発明家・フリックはその発明品があまりに危険なことからアリたちに「歩く災難」とまで言われていた。彼は刈り取り機を発明したが、失敗してしまい集めた食料が川に流れてしまった。フリックは責任をとるためにバッタたちと対決することを決意し、手助けしてくれる強い用心棒を探すために都会に出ることをアリ達と約束したのだった。都会へ向かう道中、あるサーカス団が公演を行っていた。団員たちは公演中に起きたある事件がきっかけで全員解雇され、職を失ったのだった。

A bedtime story leads Littlefoot and his grandparents on a journey to a new land, where Littlefoot discovers someone who vanished before he was born: his father! Now Littlefoot must decide between two worlds. Will he leave to be with his friends in the Great Valley, or stay behind and start a new life with his father?

When a sudden shortage of water threatens all life in the great valley, The gang of young dinosaur must cooperate with a group of bullies to make a risky journey outside the valley and find the cause.

When the dinosaur families get trapped in a valley by an ice storm, one family of "spike tail" dinosaurs volunteers to leave since they consume more food than the others. Meanwhile, the young dinos and a new adult dinosaur named Mr. Thicknose, head out to bring back their friend Spike, who has left his friends to be with members of his own species.

Littlefoot befriends with a mysterious, fun-loving dolphin-like creature named Mo, who is trapped in "new water" caused by heavy rain. The gang then goes on an adventure to the "big water" to bring Mo home.

As the Great Day of the Flyers nears, the Great Valley's flying youngsters are eager to participate in the annual exhibition to show off their skills. Everyone, that is, except free-spirited pterodactyl Petrie, whose individualism causes problems when it comes to staying in formation. Enter his dinosaur pals Littlefoot, Cera, Spike and Ducky, who encourage Petrie to embrace his uniqueness.