Here’s one cool idea spotted on reddit, a key organizer using Lego. Simply attach a Lego block with a screwed-in eye-ring to a bunch of keys and when not in use, just stick it onto a large flat Lego piece that has already been fixed onto the wall.

Pretty neat trick for everyday items like keys that tend to get lost easily. Great if you still have Lego pieces left over from childhood and eliminates the need to get a commercially available key organizer box.