Ice Age is one of my personal favorite (non-Disney/Disney Pixar) animated films. The story is good, the characters are likable, there's great humor, and, at the same time, it has very touching/intense moments. The parts with Scrat and his acorn are hilarious, and make for a great form of comic relief. I love that while he and the main characters occasionally appear in the same scene and sometimes interact with each other, he isn't actually a part of the plot- he's just there as an extra little part of the movie, a side story of sorts, that's there just to be entertaining and make laughs. There isn't too much to be worried about, but there are quite a few intense fighting scenes that may be too much for the kiddies. Otherwise, Ice Age is a great family flick that I suggest you check out.