Available at Shiny Shack http://www.shinyshack.com/product.php?prid=214826&pn=Sparrow-Keyring-and--Holder---Green ($15)
Pick your poison, pal.
If you didn't have at least one of these toys as a kid, your childhood didn't count. Don't worry, here's your chance to make it up to yourself. And yes, they totally work.
http://www.artbox.co.uk/index.php - 7.90pounds
Heed the wisdom of the guru kitty!