Didn't go in for pretending Santa Claus was real but explained it was a story that could be fun - also that Santa traditionally wore green! That was how I understood it when I was a kid, I didn't believe anyone came into my room at night with parcels, but my parents did that quietly. I can't stand people telling all sorts of tales to their kids and getting upset when they no longer believe them. I've even heard people tell kids that they leave a mince pie and drink out for Father Christmas on the kitchen table. Children are not stupid. Like floo and Rhiannon's daughters, it could be quite scarey.