A free pattern from ravelry, this, altho' I think the pattern it's based on has been around for a long time. And it's only a baby boy sweater if you purposely avoid the holes that come from making an extra stitch in the conventional way. And if you put the buttonhole on the boy side of the band. And it's only a sweater at all if you come from the USA or somewhere else where they call cardigans sweaters.
Anyway, see the difference in size? That comes from knitting one in aran and one in a wannabe - but not quite making it - aran. No worries for me - the blue one's a sample and the green one's a charity knit - but it's a pattern you might want to check your tension on if size matters, because even the proper aran one came out smallish. Plus, there's an issue with the sleeve instructions which required a little fudging. Hey ho. It's a free pattern - it'd be churlish to complain about the need for a little fudge.
Anyway, pretty cute. I think this might become my favourite for baby charity stuff - quick to make, but interesting enough to keep your attention.