It's the Cowl Neck Jumper pattern by Heidi & Finn. I really recommend this pattern, it's really beginner friendly. I used my serger for both dresses, but it gives instructions for using with a regular machine, too. I've even gotten pretty quick at changing the thread in my serger, never thought that would happen. Maybe one of these days I'll try out some of the other stitches it does.
[we started out with a little pout]
[but ended up with mostly these]
The blue/dark brown knit is by Patty Young, bought at fabric.com, and the purple/white stripe is from my local hancock fabrics (which I think cost about $2 for all of it).
I'm happy, they're happy.