Remember the clever, transforming "open/closed" sign invented by Japanese mime (you read that right) Yosuke Ikeda? To refresh your memory, here's what it looked like:
The design of the sign was such that Ikeda needed to leave out the "d" in "closed." But now designer Matt Harrison, inspired by Ikeda's work, figured out how to add the missing letter and perfect the sign:
It's one of those super-clever solutions that seems so obvious in retrospect, and our hats are off to Harrison. He's posted the updated design (and gave a shout-out to Ikeda, which we always appreciate) on Thingiverse.