NYArrow,
Having tried twice only to have both staves not work. If I were in the states I would us 4est build alone just to get some knocked out. The would be great gift for the kid you know. It is all about baby steps and expecting the worst and hoping for the best. I had fun on both attempts the first was hickory stave which is supposed to be more forgiving that most and the second was just a test to see if I could make a bow out of a wood here.
Go to the search and pic the bench, how to and build along and Powwow separate. You will find all kinds o f bows built under each. Make a note of the title and page so you can find info and who said it so you can PM them. Then you take all that info and try to make it work and if not you try try try again.
Good luck,
Kelly