I have 2 DCs aged 6 and 4. At the weekend they wanted to go out on their bikes. Normally this involves me sitting out on the drive and watching them go up and down on the pavement (unless I want to walk with them to the park).
I was busy upstairs so DH told them that they could cycle up and down on the pavement on their own. He told them strictly that they were not to go near the road and could go up to the end of the road (6 houses up) one way and to the edge of the park (5 houses down) the other way. They were threatened with dire consequences if they didn't stick to this.
I came down and was horrified that he'd let them out unsupervised. DH convinced me I was overreacting. In fact they were fine and mostly cycled up and down a few times, then came back to the house/garden to "check in", then went back out again. The one time they'd been gone for over 10 minutes I went out and checked where they were (and they were chatting to neighbour's DCs).
Spoke to a work colleague with similar aged DC this morning and she was amazed we'd let them out on their own (though she say she thought she was overprotective of her children). We live on a fairly quiet road, there is a grass verge between pavement and verge, I do trust them not to go onto the road, plus there are usually other (older) DCs about. I'd check every 10 minutes or so if I'd not seen/heard them.
AIBU?