Knitting

Do the baby's parents have a tumble dryer? If not, I'd steer clear of cotton, it may be washable, but it takes forever to dry (I also imagine it wouldn't be very comfortable to knit something like the ten stitch blanket in cotton given its lack of give). Baby acrylic or acrylic blend is my usual default (it's also vastly less likely to pose a problem with allergies). I love Zauberball, but I'm not sure it would be suitable for babies.