I've refashioned quite a few sweaters before, but all with a pretty tight knit. The loose knit meant the seams stretched and I had to bind them which added some bulk.
To me, she looks a little like she's wearing her (non-existant) big sister's sweater. If she's a slim kid like her brother, I think this may work really well for her as a short sleeved sweater as a little bigger girl - maybe next winter or the winter after.
So I'll just hang it in the closet and hope neon is still cute in a couple of years!
'Cause this babe really pulls off cute.