By recommending the videos and tableclothfactories blanks I'm not saying don't go the bulk route which looks to be much cheaper, I'm just looking at easier. Nothing like sewing a bunch of straight lines if your scouts are working on a sewing badge (do they have those?) I also have no experience with Magna but have heard them recommended several times here.
You also need to head over to Dutch's or Arrowhead or JustJeffs and get yoself a whole bunch of suspension. Do them boys up right. OR you might try the Harbor Freight strap method of suspension. Next month, Turtledog stands.

Oh, and I updated my Signature with everything you need to know