Straw hat, or maybe a propeller hat? Which has like a "spinning animation" and the colors can be what the characters choose. Like the rabbit ears hat. The codes should be
Straw hat = (hat#sh)
Propeller hat = (hat#ph)
(Yes they are abbreviated)
As for straw hat, it's just ordinary. Something for summer likewise. I don't think it'll have a animation. And the color shouldn't be really customized
Cupcake pawns can always be added too, which could also be (hat#cp)
The animation can be like someone "biting" into it, but not a actual person is there, just a biting animation.
--Hopefully the pawn codes aren't taken YET.
-- Cupcake icing can be customized into a specific color the person may want whatsoever. (: