Apart from displaying any text on the badge you can also play games like Tetris and Snake with it.
You can watch the video of the badge here:
The cost of the badge is Rs 2200 or approx $33. It is mostly BOM cost and I am not charging for my intellectual and physical efforts behind it. People who filled this form are therefore expected to pay for it at the event.
The android app is ready and the Iphone app is on its way.