also try looking for "fingerless gloves". Hot Topic carries some fun ones and there are a TON on Etsy, and you could commission an artist to make exactly what you'd like, I bet. I have made some for my DD to wear in the computer labs as it is always so cold in there, just make sire if you want the cut off finger type or the thumb opening type like you described, or one pair of each! If she has any old tops, that have spandex in them you can make a quick pair quite easily, she can embelish them any way she likes too. Cut the arms off and sew the ends over so they do not unravel, do the same for the thumbhole..or long knee-high socks can be used as well..hit the dollar store to experiment or like I said, old tops that she no longer wears.