3DS

The game is called Rittai Kakushi E Atta Koreda, which apparently translates as "3D Hidden Images: Found it! Here it is!". Best. Name. Ever.

Using the DSi's camera, the game tracks the player's eyes to create the 3D effect. The onscreen image moves according to the position of your face which creates a sense of depth.


Cheers to @Lergik for the link.