Ooh, loving the asymmetrical colour blocks on that cardigan! I'm loving the wave of truly modern and funky baby/toddler knits lately. The traditions and the classics are great and there for a reason, but sometimes you want something a bit newer. Drop shoulders for ease of making, so all you've got to focus on is your stripes, which are made to stand out with a couple of rows of purls breaking up the stocking stitch. GORGEOUS.
This has been written in King Cole Cherished DK, but you can use any solid colour DK yarn (or even self-striping if you want to go a bit funkier).