Colorful stranded knitting
Bottom-up construction
I-cord cast-on with instructions
Fast knit, fun to make
Chart and written instructions

Use any DK or light worsted yarn. If you want to use different yarn, check your gauge for 20 stitches, which is one repeat. Change the number of repeats and the size of the needles until you get the right number of stitches to cast on for your size.

I used less than a whole skein of yarn in each color, which means that three skeins of Karisma is probably enough for two hats. My hat weighs less than 75 grams.