Every day on Twitter, hundreds of people tweet about mac & cheese. So Kraft Macaroni & Cheese invented a new game - Mac & Jinx - based on the traditional kids' game of jinxing.
When two people tweet about mac & cheese, both of them are sent a message calling their Mac & Jinx and providing a link. The first one to call 'Jinx' by clicking the link and giving their address wins a package containing free Mac & Cheese - and an official Mac & Jinx T-shirt.
When two people tweet about mac & cheese they are each sent a message and the first one to click on the URL wins a tee shirt and 5 boxes of mac & cheese.