I found a tutorial on MADE for some pajama pants for toddlers. And lucky me, her pattern happens to be a 2T/3T which is just the size I needed.
They sewed together really easy and turned out equally adorable on my little girl. For the next one, I'll probably play with the pattern a bit since she's still in diapers and needs a little extra room in the toosh.
I had polka dotted twill tape, so the tie on the jammies made a cute detail.