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3, ice age 1 ice age 2 and ice age dawn of the dinos.
Since i don't know which one you mean, I will give you all of the ice age movies.
1. Ice age
2. Ice age 2 The Meltdown
3. Ice age 3, Dawn of the Dinosaurs
4. Ice age 4, continental Drift
Hope this helps!
Supposedly, in 2009
The Ice Age 3 ad-game is no longer on Poptropica.
About every 3 years. The last ice age was 'Ice Age 4'