If I were buying this box I probably need educated on the flies and the bugs they represent. Moreover, the approximate time of years or conditions these bugs would be present in trout streams. Additionally, the type of water they can found in and how to best fish or present them. An image of the natural bugs would help a novice or beginner out a lot. There is so much to be aware of in fly fishing it can be overwhelming. (It’s partly why I love it so much).
If your audience is not novices then maybe QR codes to how to tie and a list of materials. And maybe some more nuanced or advanced notes about the bugs or flies (eg: what plants are blooming at same time, notes on takes, or personal anecdotes about the patterns).