How to make a hat? Help!?

Ok so I have a science project and i need to make a hat. I bought a lot of felt. Can anyone give me any suggestions on how to make my hat? Not felt, sorry, FLEECE. Just a hat that will fit over my head. Instructions and how the hat will look, please. I'm kind of going for the loose beanie look. It fits where its supposed to then its loose and hangs in the back? I don't know what it's called. I need help!