as a fellow Washingtonian, I'm curious to know more about your organization if you'd like to share.
Here's my unsolicited opinion on your classes.
I agree with PatM.
If you get kids to make primitive arrows, you'll end up with some arrows that not even the best archer could shoot well. If you get kids to make primitive bows, even the worst bow would shoot a good arrow to the same spot every time if aimed well. That is, any old stick will make an accurate bow, but only the finest twig in the most expert hands will make a good arrow.