I think I'm about a 3 or a 4. I like to keep an eye on her to make sure she is safe ,but I have no problem letting her do her own thing as long as she isn't in danger of hurting herself. I am pretty picky about who watches her-we had one babysitter for a while and now she goes to daycare-those are the only people who watch her besides me and dh since we don't have family close by. I don't think I would allow overnight visits until around 9-10 years old and I knew the family really well. It depends on the child, but I think a lot of children aren't ready for overnights before then anyway-I remember I tried to stay overnight at my cousins' house as a young child and got scared and insisted on going home, lol!