Just wondering what is the norm/acceptable. The dcs are 9 & 10. Wibu to nip to the shop for 5 minutes. They go to the shop and play out by themselves all the time and dc10 has a mobile should they need to call me while I'm out. They're pretty responsible and I'd lock the front door to stop anyone getting in but unlock the back door to the secure back garden in the unlikely event of them needing to get out of the house.