So, a few years ago, I bought a variety pack of safety pins. Back in ye olde 2010, I never had a safety pin when I needed it. Gotta hem pants. No safety pin. Bra being weird. No safety pin. So I set out to buy a big honkin' pack of them, which turned out to be the standard size. Safety pins come in packs of what my art degree math says to be about a bajillion.
Years later, I've discovered that, in reality, I didn't really need a whole lot of safety pins. Time to put them to good use. If you've got a cup full of safety pins, this project's for you.