Before Ethan was born, I started knitting a baby sweater for him. I selected the Cascade pattern and Nashua Handknits Natural Focus Ecologie Cotton. It turned out so beautifully! Like the hats, I didn't bother to do a gauge swatch. I followed the instructions for the 6 month sweater, figuring that even if it turned out small it would at some point fit my baby.
I think my gauge was off or the sweater turned out small for some other reason. It's fitting Ethan just perfectly now, when he is nearing three months and just over 12lbs. I'll try to squeeze him into it a few more times before he grows out of it.
I like this sweater in a washable cotton, but I think it would block better and the leaves would lay flatter with a wool yarn. Next time I'll do a gauge swatch and use wool yarn.