When you get your package in the mail you will have everything right in one place to get going on your project.
One thing I enjoy doing when I am making designs is to subtly theme the packages, with things that inspire.
It just adds a little something extra, a little secret inspiration. For example, the Mary Poppins themed bag had a lining that evoked a carpet bag, and some thoughts about what a remarkable character she was and that her real magic was her confidence.
I like to give all the projects a bit of a back story.
I actually started out in subscription boxes by ordering them! I am a massive fan of curated subscriptions myself, so it gives me a lot of insight into making the packages special.
I strive to make getting the package special and an experience.