Until now, we've had precious few options for disposing of the knitted atrocity Grandma made—regift it, stuff it in the bottom of a drawer to languish, or donate it to charity. But with the ingenious Imogen Hedges un-knitting machine, you'll be able to devolve that sweater in no time. Best of all, you've now got the perfect gift for grandma next year—tidy balls of yarn for her knitting.