Texas Instruments reputation for boxy-looking yet highly-functional calculators stands up with the Ti-83 Plus, but not just any Ti-83 Plus. This one has been modded to conceal a real Nintendo Game Boy, designed to fool even the most sharp-eyed teachers. Video after the break.

The end result isn’t the cleanest-looking project ever, but who cares? It works, and better still? It only took about thirteen hours.

[via Technabob]