"Hey, there's something on your shirt." "Oh, let me brush it off -- did I get it?" "No, it's still there. It's, like ... a fishing game?"
The first 3,000 Europe residents to register their new 3DS systems with Club Nintendo this Friday will receive a t-shirt with a picture of the question-mark AR Card on it, allowing them to augment the realities of their own bodies with archery, fishing, and other AR Games. Yes, it sounds funny, but it also means the person wearing the shirt has to hold still and watch someone else (the person with the 3DS cameras pointed at the shirt) have an awesome time.
Registering a 3DS in Europe will also get you 750 Stars, which puts you well on the way to that New Super Mario Bros. Wii sticker set you've been eyeing.