I took my six year old daughter to see Up this past weekend and we both absolutely loved it. This is one of the best Pixar movies I have seen in a while. My daughter did tear up a little bit on a couple of occasions but she really wants to go back and see it.
Great movie. I took my five year old daughter to see it and had to ask her to quiet down a little because she was laughing so loud at certain parts. She did cover her eyes during the parts with fighting but she can't wait to buy it when it comes out on DVD. I would recommend it to anyone.