Professor Stein's Screw headpiece from Soul Eater
I did a professor Stein Cosplay. I really like this character. It is easy to wear. And the screw spins. I will admit it is fun when people stop you at a con, and ask if the screw spins. I never verbally answer. I just spin the screw. Mine is very loud.
The screw is a big empty cardboard box with a party clacker in it. I feel the emptiness of the cardboard acts as a resonance chamber and makes the clacker even louder. Because my screw is quite loud.
Basically I have a head band. I took small pieces of PVC and hot glued them to the head band. I also drilled small hole through the pvc and zip tied them to the head band.
Below is a pic of the party clacker. I ended up removing most of it so it could fit inside the screw head. The small white piece on the left is the axle for the party clacker. When I finished it became the axle for the screw head.
Below you can see the axle slides inside the PVC . The axle has a gear on it that engages the clacker. This gear also works as a flange to hold the screw head together.
Below is a view of the axle from the view of the headband. I used some cardboard inside the PVC to fill the gap between the PVC and the axle.
Below is a view of the inside of the screw.
Below is the top part of the screw. I took the top of a round box from Joanns. I trimmed the box to make it much shorter. I installed the balsa sides for the screw slot. Then I cut the box for the screw slot. I also added some masking tape around the inside of the box. I was trying to achieve a tighter fit on the lid.