I'm not to sure but i think Propeller caps are silly, because the propeller needs a engine, and clearly the human body is not an engine, for this man-made propeller, unless they attach some mouse running wheel thing to it and some how crazily allow that wheel to send that propeller hat into a fast enough motion to fly. But either way how do you control the propeller hat? there is no steering mechanism. So this question is Not answerable and therefore should be destroyed.
No seriously the answer is YES. The site does have it. I'm not too sure about in-store, but you might as well buy it online... It's only $12 and free express shipping.
Ebay will also sell it.
Online
buy it
Men want to buy baseball caps with team logos on them.
One beach is maintained by the state, the other by the city. There are two separate passes to buy, though the state one will get you into all California state parks.
You can buy ring caps at most good jewelry stores.
You can buy weight loss caps at GNC. They have a large variety of weight loss caps as well as protein shakes that are available at GNC.
A home brewing supply store will carry bottle caps.
target
dftba.com
akolatronic.com/estore
You don't buy it, it's a free item, anyone can get it but you have on club penguin at the right time e.g when there is a party on. At the moment there are 3 colors for the propeller hat red, green and blue. If you haven't got the propeller hat it is because it was an old item but you never know, Club Penguin might bring out yet another color of the propeller hat!
EBAY!!!!