I'd get her the best quality, small, lock-blade you can find for cheap money (<$20?)

https://www.amazon.com/Gerber-Ultra...lade+knife&qid=1589228543&sr=8-2

"There's more to optics than meets the eye."--anon

"...most of us would be better off losing half a pound around the waist than half a pound on our rifle."--dhg