When did your children stay overnight somewhere else?

We are isolated from family due to living so far away, however my children do love their grandparents and they always have great interactions over FaceTime at least or when in our presence during visits, but they’ve never been left alone or been looked after by them and due to separation anxiety, I think they would find it difficult and so I’m not considering it.

I was just wondering what age your child was left overnight somewhere? Especially with someone they don’t see too often and in a house they only occasionally visit... how did it go?