Have you ever been to Loop in London? I think it's quite possibly the most exciting yarn shop in the world. I saw a little cardigan (sprinkle) knitted up on display there last year and was told the pattern would be published shortly in Juju's Loops, a new pattern book by Susan and Juju of Loop.
It's a fairly quick and easy bottom up knit, but it's a little disappointing that the pattern is only one size; 3 to 9 months. With a little adding on here and there, (an extra chevron in the sleeves and back), I enlarged it to fit a one year old, and I reckon with a little scaling up the pattern could work for me!