Do you ever wish that making money for you was as easy as it is for Mario? I mean, when that guy needs coins he just finds a block marked with a question mark and gives it a punch. Voilà: instant coins. Nobody knows what he spends all these stupid coins on, but he sure does like collecting them.

Well, street artist Posterchild wants to give you the same feeling of coin collecting, which is why he's been putting up question-mark blocks all over public places. And if you want to join the fun, he has instructions on his site for how you can build your own. Of course, the materials cost real money, and when you build it no coins will actually come out. But hey, it looks pretty sweet, no?

Posterboy, via Urban Prankster