I tell the grandkids that Santa is related to Doctor Who and can travel through time. Thats how come he can deliver all the presents in one day and gives the impression he's everywhere at once. Which also nicely solves that tricky problem of when out shopping they ask, how come theres more than one Santa. To explain a slipping Santa beard, whisper to them that Santa is actually a baldie and uses reindeer poo to stick his beard on! Just not in Marks and Spencer or they'll chuck you out:)

Pinky - you left the lens cap of your mind on again.