My sons are still a bit young to deal with this yet. I want them to have social lives and experience life, but I believe in guiding them in that direction, not just throwing them out to the world. I enrolled my son at 3 into a 2 day/week mother's day out program so he can meet friends there in a safe environment, away from me, but....still safe. I pay attention to who he likes in his class, and meet their parents at little events (the Christmas play, class parties, etc). I chat to the other parents when we get there a little early and we're waiting to pick up the children. A few times we've met on days that the children did not have mothers day out: someone just casually sent out an evite to go to McDonalds playland, a picnic at the park, Let's Jump bounce house play....it's methodical, but what we're doing is letting children have friends without us present, but we're talking, checking each other out, getting to know each other, and they're doing the same to us. It's a good thing. He gets invited to play with neighbors, and that's a good thing, but at this time they can all play in my yard OR I will go and visit the other mom in their yard. We've discussed swapping date nights (I'll watch her 3yr old so they can have a date night, and she'll watch mine another night)-this developed over being good neighbors for 2 years. But that's more an occasional babysitter situation than an everyday thing. It will be a little while later, with people I've developed relationships with over time, to just let my boys go into a home without me there. At your daughter's age, I will say this: she should be able to know what a socket is and not mess with it. I would let her stand on a balcony, and the rule would be look, don't climb. (If that rule can't be followed, it's fine...she'd just have to come in and lose that priveledge). I'd let my daughter play in someone's home but yes, I'd be there to have coffee with the mom. I'd ask the mom if I should bring a coffee cake or some snacks in a short conversation to let her know I'm planning on staying for a visit, too. Something like "Oh that sounds great, I've been meaning to talk to you about__" lets them know to straighten up the house because you're coming in. (ha) What's easier is knowing who your children's friends are so you can initiate the first playdate, so the parents can kinda know what to expect if your kids came to their home. Make your home fun and inviting for your children and their friends! We are laid back and want the children to have fun. We don't hover over them and correct their every move. But we also know our house has safe people in it, the house is child safe, and any parent interested in coming over would be more than welcome to come in so we can get to know each other, and we have basic rules that will not change. Children can play in the bedroom but the door can't be closed. We're working on setting up a playroom (used to be the den) as an alternative to bedrooms, because it's more centrally located and I can hear what's going on and being said (or at least the tone of voice) without being in their space. TVs and the computer aren't allowed in our bedrooms. I am that mom that will have treats (sometimes healthy snacks, sometimes warm cookies or brownies) and encourage people to come by (so I can get to know them, and I'd rather them here than somewhere else). But I wouldn't hold my sons back, they can have fun under our basic rules. My oldest son has friends from church, the neighborhood and playground, small fry club, mother's day out, and starting this fall, soccer. I know I'm fairly strict (but not overbearing), but he's definately got a social life going. The baby will follow suit; it's working for us. I think affecting her childhood would be not allowing her to go to birthday parties because there's 8 kids there, or not allowing her to go places because you're not willing to go, or not allowing her to play sports because she could get hurt. That kind of stuff is over the line. But saying "hey---you'd like to go to the party? you've been doing well in your chores and homework, so why not? we can go together" and make friends (or at least be friendly) with her friends' parents so this will be seamless. Offering to volunteer where needed at events or homes, or offering up your own home, or going to do a safe alternative: it's work, but it will be good for all involved. But isolating them where they don't really have outside interaction.....not good at all in my opinion. I have lots of casual conversations like "what do you think about__?" or "if this happened, what would you do?" and seeing where my son is and how he feels about things. This helps his confidence and self esteem, and I can know his maturity level a little better. You can't really go by age as much as maturity level, you know? Finding balance is key, and it sounds like you're aware of dangers but also willing to do what's needed. Good luck.