Your kids must be loving this.
I learned how to "sew" from my dad in my junior year of high school. Camp stuff, tarps, covers, etc. I've never been intimidated by subsequent projects, and although mine are not nearly as professional as your work, it is highly rewarding to turn out the perfect, functional, piece of gear.
Your kids probably won't even realize what they are seeing until they discover "not everybody can do this, but we can."
Very nice indeed!