I have adopted the Harry Potter scarf as my favored carpool/waiting room knitting for this season. Miles of stripes are simple and calming to the frazzed nerves and unfocused mind. I am, however, branching out into sweaters as well. One child has requested Mrs. Weasley's outrageous sweater with the multicolored crocheted ruffle sleeves--and Alison Hansel has generously included an interpretation in her excellent book. If only my boys liked sweaters, I would love to try the handsome ribbed Quidditch sweater, too.
Check out this article with pattern links.