Sleepover

When is the right age for kids to have sleepovers? Now, we are not talking a famous pop star inviting Vivien to his big ranch. Nice kid, nice family. Do you let your kids have sleepovers? Either at your house or elsewhere?

My niece was 6 when she had sleepovers with Vivien. She would arrive quite bravely with her little suitcase and never had a qualm. But then I’m her aunt, so I think there are different rules. But should there be?