DH has suggested we go out to dinner together and leave the DC home alone. His parents often did this once he turned 10. I don't know if I'm being over protective as I was never left alone as a child. We live in a block of flats and would let our direct neighbours know they were alone, DC know them and could go and knock if they needed help for any reason. They offered to do this a while ago, but we thought the DC were too young so didn't. Neighbour suggested it as it's what her parents did when she was young (she wouldn't want to sit in our flat with them).
Get them ready for bed, stick a film on and let them go to bed when tired/fall asleep on the sofa. Acceptable or not?