exH and I have just agreed to Christmas arrangements. I'm having them Christmas Eve and Christmas day until about 4/5pm - when he'll come over, they can show him their presents and then will stay with him overnight, and he'll drop them off similar time on Boxing Day - so we'll have them for part of each day. I know it's a fair way to do it, but I'm really dreading Boxing Day morning (in particular) getting up to no kids wanting to play with their new toys.
It's going to be so bloody weird, I've never spent part of Christmas day or Boxing day without adult company - let alone been totally om my own.