I thought it would be interesting to document an original project as it went along, adding and editing steps as I go, maybe including suggestions or comments from the community.
There is a chance that this project will finish up in a merely decorative wall-hanging, instead of a flyable kite, but that's a risk I'll have to take.
Step 1: The Background.
We collected the feathers with no real purpose in mind, just to "do something with them".
As I rifled through the feathers, laying them out to see what we had, I noticed that we had some matching pairs - feathers from opposite sides of the bird.
The pairs looked ... like ... wings ... sails ... I ought to make a kite!