This pattern fits approximate ages 2-5years.
I used Stylecraft special yarn, which is a premium acrylic.
The main body of the hat takes approximately half a ball of aran weight yarn and uses a 5mm hook.
The trimmings can use scrap yarn, and the colours required are orange (eyes), green (wart), purple (optional stitching for prickles), white (teeth and horns) and a soft peach or beige for the inner ears. Will the exception of the main part of the ear the trimmings use DK weight yarn and need a 4mm hook.