If you happen to lose your 3DS AR cards don't worry, you are able to print out extra copies. As an added bonus the size of the card seems to directly correlate with the size of the 3D model projected upon it, meaning you can put a life sized Mario and Nintendog in your own living room. I will be interested to see how big people will go with this and am also curious about whether or not gamers will be able to make the 3DS project objects of their own design onto the cards.