Turn work and knit back to beginning of row. Continue in this manner until you are once again knitting all 28 sts. Repeat pattern ten times. Cast off leaving a long thread of yarn. Fold knitted piece in half and sew the two ends together to form the hat.
Variations Add a pom-pom or tassel to the top of the hat.
Alternate colors every group of rows or make every grouping a different color. Cast on many more than 28 sts. A ball can be made following the same basic idea but this time you will turn back before coming to the end of the row on BOTH ends of the needle. Cast on 298 sts. Knit across one row and turn.