Ice age 3

Today, I read Ice age 3.
I have seen this movie before,
 but ｍy memory is a little vague.
In this story, there are some animals.
 For example, mammoths, sloth,
 weasel, tiger, and dinosaurs.
Manny, Sid and Diego are friends.
 They live in the ice age.
 They have a lot of adventures before.
Someday their friend Sid escaped from
 the dangerous valley of the dinosaurs.
 They try to help the friend. But there are many problems...