To make a hat you need:
To begin, your legacyblox app is probably linked to your account, you have to launch the app and go to advance. once you have, you must select your client year, recommend 2009 or 2008 although 2008 is a LITTLE buggy occasionally.
You can make your hat out of parts or what ever, you just need to export it to a file and thats it. And then upload it.