Today, we had a Dalek, and it was brilliant.
This is the dalek on Youtube earlier this morning Youtube above was taken by one of the guys from the Sony Centre next door. I spent most of the day going 'this is so cool!'. The Dalek chased pigeons in the square, interacted with passers by, had an ongoing rivalry with the little electric street cleaner machines, and was absolutely the best marketing money I've ever spent.
The Dalek cake made by one of my customers was also a huge sucess, and we sold a bunch of Martin Wallace's new Doctor Who Card Game (coming soon to a Discworld Convention near you!) I may manage to make photos available.