Jason Allemann has used nothing but LEGO to build a fully functional combination safe. Not only does the safe lock with a three-number combination, Jason has designed the safe so that the safe itself cannot be removed from its outer case and opened without either knowing the combination or physically breaking LEGO pieces!

A picture doesn’t really prove it, so here’s Jason’s amazing video.

If you want to build you own LEGO safe, you can download instructions from Jason’s website.