Lol make your question clearer because on ice age 3 Peaches is the little daughter of Manny and his wife :) and she was born at the last of the ice age 3 movie :) she is a girl also and by the way she will be in the ice age 4 movie also.
The first movie is simply titled Ice Age. The second movie is titled Ice Age: The Meltdown, and the third one is titled Ice Age: Dawn of the Dinosaurs. Finally, the fourth and most recent one is Ice Age: Continental Drift.
No one really knows if Ice Age 4 will come out, or if Animated Dreamworks is creating a Ice Age 4 movie. Just wait for maybe a year, and if the movie does not come out, well then there is no Ice Age 4.
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!
Naturally it boils down to personal opinion, but Ice Age Continental Drift was the fifth highest grossing movie of 2012 but was the lowest grossing in the Ice Age series until 2016 when Ice Age Collision Course released.