After knitting a stockinette version of The Dude's Sweater from The Big Lebowski last year, I was inspired to knit a child-size version for my son with the leftover yarn (Knit Picks Wool of the Andes Bulky in Bare, Caribou, and Coal). I'm also doing this sweater the "right" way, which means the entire garment is worked in 1x1 ribbing.
I toyed with the idea of using a tubular cast on but fear I might be short on yarn. I am, however, using TECHknitting's advice to eliminate the "icky dots" that result from purling in more than one color. Solution: Knit all stitches in the first round or row of a color change.
And speaking of colors, the bulky yarn combined with a pint-sized sweater led me to do away with the more intricate colorwork and use only the repeating "Z" chart (shown below) at the middle of the sweater.
My intent right now is to knit sleeves, then join them to the body and knit around with raglan decreases. Also, I will be doing my first ever steek to turn this into a zip-up cardigan.