My rule is if the door is open or not. If it's open, come on in. If it isn't, only emergencies please! We have 3 kids (5, 5, 8) and they can actually manage

My rule is if the door is open or not. If it's open, come on in. If it isn't, only emergencies please! We have 3 kids (5, 5, 8) and they can actually manage themselves for hours at a time. And I don't mean youtube, TV, or tablets. Just regular playing. My wife works part time so in the summer they don't have constant supervision in the morning. This is where having more kids can be easier. 1 kid can be lonely, or be unable to get help if they hurt themselves. 2 can be a problem if a fight breaks out. With 3 you have someone who can come get you if there's a problem.