Ahh that's awesome ! Good little investor on your hands. You know - at her age - will she ever need the $200 or $300? If I were you, I'd advise her to hold onto it for many years. By the time she's ready to go to college - one of two things could happen - ETH is worth a small fortune (and can cover tuition yay!) - or, it fails, and she barely even remembers the $35.
Obviously - there are middle ground scenarios where she takes some profits. ;-)