The Forks Cap is part of the Magic Balls: Serendipitous Color pamphlet.

(What is a magic ball? It’s a ball of yarn that has been created by knotting together different lengths of yarn--when you knit the color emerge like magic! The 8-page ebook contains instructions on how to make magic balls that give the effect you want, how to choose stitch patterns that will show of the color effects to their best advantage, how to plan a project, a list of free patterns that would work well with magic balls, the Forks Cap pattern (stranded), the Pseudocrochet Scarf & Cowl, and the barest outline of a two-color brioche cowl pattern.)

This slouchy cap was designed to work with two magic balls or with one magic ball and one solid color.

This is a fun way to use up your fingering weight scraps! Of course, you could use any yarn that has color changes built in: Kauni, Noro Sock, Zauberwolle…. Or any two solids!