I wear it to keep my head warm in wintertime.
Beanie
I am deposited on a princess' head.
Crown
I wear one when I ride my bike.
Helmet
I wear it to keep my hair dry
Swim Cap
I am red, black, or yellow and I am worn to put out fires
Fireman Helmet
I am white and long and I am worn in the kitchen.
Chef's hat
There are several colourful ones in the circus.
Clown hat
Cinderella's fairy godmother wears one.
Fairy hat