Fly, fly, fly away! Or perhaps just some spinning. Either way the hat is fun!
Only the propeller NEEDS supports, but the hat ceratinly shoul have them as well.
The model isn't extremely scalable because of the tolerance between the propeller hole, cap, and extrusion from the hat. However, it can be scaled to an extent. The cap should be glued to the top of the hat with super goal. The propeller goes in between.
This model was designed in Tinkercad and printed on the Creator Pro.