When toy story three came out my brother was going to college and im the same age as Andy's little sister and we saw it together and the scene where they were arguing about who would get his room was the same argument I had with my brother and we both just looked at each other and smiled :)
aaaaaw :) that's actually the cutest thing ever. My brother never left cos we live in Australia and so he can still live with us. I never got the chance to have a bigger room...
For example: Grown "Up"
There are plenty so I don't see why you can't have one of your own.