Operation Happy Sock

Do you want to cheer up the cats in your local shelters? Try Operation Happy Sock!
Anyone can make a catnip Happy Sock, it's so easy everyone can have a go!
Make sure you use clean, old socks and quality catnip.

Sources of catnip :
EFA member It's Meow or Never who sells the 'nippy.
Alternatively try a search on Etsy for 'organic catnip'.