A bit of fun.
Everyone knows that Santa (or Father Christmas) lives at the North Pole. This application used the camera and built in compass to find Santa in the sky. Jingle Bells plays louder as you get nearer to locating him, then you see him ride across the sky.
This application is a bit magic so can locate Santa through the building, but it is best to use it outside, then you can see him above the roof tops.
Just right for explaining where Santa is going to be coming from in a few weeks from now, to your kids.