Make her hunt for it. A nice card with a clue to find the next clue to find another clue, each one having a small fishing item nicely wrapped with the clue to the next one. Run her upstairs and down, inside and out. To the car and backyard. A dozen clues is about right. She will never forget it and her eyes will sparkle every time she talks about it and the story will be told many times about what you did. Yes, she will probably have it figured out before she finishes finding everything, but you will not be giving just a fly rod. You will be giving fun as well as heightened anticipation!