Ice Age: Dawn Of The Dinosaurs

Not the greatest movie.
Obviously (like most movies), it can't hold a candle up to the original.
But its definitely better than Ice Age: The Meltdown (aka Ice Age 2).

The story... Sid decides to prove that he can be a good parent.
He finds 3 eggs, and 'adopts them'.
They end up hatching into dinosaurs, and there mother ends up coming looking.
She finds them, and takes them & Sid.
And then it's up to Diego, Manny, Ellie, Crash & Eddie (with the help of a new friend, Buck) to go and rescue Sid.

Not a great movie, but it's good and worth a watch.