I was always brought up to be very careful in my parent's house. They had a lot of antique furniture, and woe betide anyone who put cups down on polished surfaces, feet up on the furniture while wearing shoes, or threw things around in the house (too many ornaments at risk). Also, my Dad's pride and joy was his hi-fi system, which was state of the art, and I was banned from going near it.. I had my own cheapo record player in my room.
Because of that, I grew up knowing that if anything got damaged there would be consequences, so when my parents went out for the evening, which they often did after I was 11 as they were dance teachers, I was left on my own. We had no telephone either. If anyone had rung the doorbell, I would have peeped out of the window, and if I didnt know the person, I wouldnt have answered it. The barking hound would have been enough to put anyone off in any case.
I was sensible, I was able to make a meal or a hot drink if I wanted one, I didnt invite friends in as I didnt want to risk anything getting damaged, and my parents knew that they would come home to the house as they left it, with me happily watching tv with the dog.
By 12 I was babysitting other children.