Ours are now 17 (Autistic), 15 and 10.
We started leaving them last year during lockdown 1. (then 16,14 and 9)
We built up from a 20 minute walk with the dog, an hour at the allotment (5 minutes away) 2 hours in town (also 5 minutes away) having a leisurely lunch post lockdown.
We talked about various scenarios like deliveries, people visiting unannounced, what is an emergency, what to do if worried. They all have our numbers programmed into their phones.
It feels like a part of the world has opened up to us again. With the eldest being autistic we've never been able to find babysitters and he doesn't like being away from home. Without any external support possible and being in a smallish space 24/7 with running a business from home and homeschooling all three I needed time out and we needed to be able to have the odd private conversation about the future (especially with eldest not sitting exams and precarious future)
Between the three of them they're very sensible and they all get on and respect each other and personal space.
It has been interesting the things that have unnerved them. Initially a delivery, subsequently a neighbour turning up to borrow something worried them (lovely neighbour, I don't really know why). The one that caused most upset was the landline ringing! I have this mental image of the three of them standing around this relic watching it ring and listening to the mundane sales message left on the answer machine.
What is really important to me is not that unexpected things can happen its their ability to react and handle the unexpected. Some DC can do this at a relatively young age say 7. Others are worriers and would find this challenging at 15.
How do you feel yours would handle the unexpected - would they worry about calling you?
Are they happy to be left?
Mine are quite proud (in a shrugging shoulders teenage way) that they get to choose to stay home sometimes now.