Leave it to the stationery-loving Japanese to come up with a new way to enjoy writing notes. The Omoshiro Block (loosely translated as ‘fun block’) utilizes laser-cutting technology to create what is, at first, just a seemingly normal square cube of paper note cards. But as the note cards get used, an object begins to appear. And you’ll have to exhaust the entire deck of cards to fully excavate the hidden object.

Source: Omoshiro Block: A Paper Memo Pad That Excavates Objects as It Gets Used