My son was jealous because I made his sister a Hello Kitty hat. When I asked him what kind of hat he would like me to make, he said "Red Angry Bird!" O_o I don't think he realized that I am new to the crochet game, but I did my best. :D This hat is derived from several different patterns I found online. A helmet hat pattern (that's the style he wanted) and the face was from an amigurumi pattern for the Red Angry Bird.