When I saw a hat with a spiral pattern morphing into to star burst at the top, I just had to experiment with the idea. The two hats in this pattern are the result.

Requirements

140 - 190m aran/worsted weight yarn
4.5mm circular needle 16 inch
5.0mm circular needle 16 inch
5.0 mm double pointed needles (for making i-cord)
card for making pom poms
buttons