I shared a room w my sister from when I was 5 til I went to University. I would have loved my own room but I didnt hate sharing with her either. We had fun! My two kids (6 yo boy, and 5yo girl) just recently started sharing a room to make room for their new brother. They will share til he's about 2ish, then the two boys will share the bigger room and my daugther will get the smaller room. It was a big adjustment at first but we gave them lots of time to get used to sharing before the baby came. We sweetened the deal with a whole room make over, new paint, new decals on the wall and bunk beds (of course we have to take turns on the top bunk!)