Pictures with Santa.
Good luck! Swinging lizards and sending prayers. My oldest daughter definitely knows, but we don't say a word. This will probably be the last year for the middle child, but we still have the litttle one. I'll never stop hiding the presents until the house is asleep on Christmas Eve! I don't care how old they are.
Even when we were teenagers, my parents would put out the bulk of the presents after we went to bed. There were young ones, but even as they became older, presents came out after we were in bed. It was great to get up on Christmas morning to see the tree all lit up and full of presents beneath the tree.