I finished a vest for El. It's the JCasa pattern Neighborly (ravelry link).
It was really fun to knit - simple but effective.
I used stash yarns - Cascade 220 for the main color (1 skein), and Needful Yarns Arte for the stripes (1 1/2 skeins). El just turned 2 and is in the 50th percentile for height (25th for weight) - this looks like it'll fit her for a while. I wanted something that would keep her belly warm, but not be too sweaty (this is Florida, after all).
I think I'm going to try the next one in CottonEase.