Philadelphia Little Free Library is filled with yarn instead of books.

There are over 90,000 Little Free Libraries around the world, but one of the first dedicated to yarn popped up outside Philadelphia.

According to news site Billy Penn, local proprietor Liz Sytsma fills up her Little Free Fiber Library with a bevy of yarn, and each day it's cleared out. Don't let BIG STRING learn about this.

Sytsma owns the Wild Hand yarn shop and uses the Little Free Library box her dad created as a sort of outreach to the community. It's caught a fan base on Instagram and Twitter as a result.

Never seen this take on the @LtlFreeLibrary movement before—a Little Free *Fiber* Library outside Wild Hand yarn shop in Mt Airy, Philadelphia. There are knitting books and balls of yarn inside. #AmKnitting pic.twitter.com/XEHHSTkMrT

— Claire (@vcmcguire) February 16, 2020

It's been a huge success in the one month since it started. "I was surprised," Sytsma tells Billy Penn. "Yarn shops all over the country reached out. Also people from all over wanting to put yarn in it."

Aww, wait until Hobby Lobby or Michael's gets a whiff of this and starts a crackdown.