Parents of preteens - is it ok/normal to let your preteens spend the majority of their time in their rooms?

I have two kids, 10 and 12. They LOVE playing video games, facetiming with friends/family (we have the majority of our extended family out of state), drawing, Legos, etc. and they spend a substantial amount of time in their rooms "hanging out" alone (sometimes together). We take trips as a family, go to movies, church, etc., but I am unsure - what is a healthy amount of time to be isolated like that? I talked to them to see if they wanted to do more stuff as a family in the evenings, and they said not really, that we do a lot. I feel slightly guilty because i enjoy the downtime to do what i want or need to do. Is this just a new stage in life for my husband and I? Or do i force the issue with them? via /r/Parenting http://bit.ly/2IXsk2A