Arm Knitting: A Scarf in 30 Minutes? Who needs needles? WSJ's Rachel Dodes shows you how to arm knit: a fast and easy way to get a chunky hand-made scarf.

Materials: Three skeins of cashmere or soft wool yarn (such as Cascade Pastaza, 50 percent llama, 50 percent wool), about 132 yards each or 300 grams total (2 skeins of gray and 1 skein of red, or ...