5 yr.s? BB gun for several years and then a .22 youth rifle. Don't start her off with a flinch! She will have years ahead to grow into anything suitable for deer, etc. She'll appreciate the gift of a new rifle when she is older, anyway. It will be more memorable. .22 CB's will be your friend. Hearing development for the very young is so much more prone to irreversible damage than us old guys. Once damaged, it doesn't recover. It's just my opinion, but I'd tread slowly.