Even if you take your time, you should be able to build a ZagNutz in about a day.  After you gather up all the stuff you will need, you can easily build two at a time for not much more effort.  So, to get started on one, this is what you'll need.

1.)  DOW Corning Bluecor fanfold insulation 1/4" thick (at least 3 panels or two folds/creases)
2).  2 pieces -- 1" thick white, pink or blue foam at least 1-1/4" wide by 24" long.
3.)  Very sharp Xacto blades or olefin blades
4.)  Glues can be hot glue, contact cement (non-volatile), 5 min epoxy, 3M 77 spray on or Elmer's
      spray on
5.)  One carbon fiber arrow shaft, less fletching (feathers) and threaded point adapter.
       You can find these pretty cheaply at WalMart, Academy or archery shops.
6.)  One piece of 2 mil coroplast 12" x 12"  (You can substitute 4 mil sign material if necessary
       you can get those at any convenience store/gas station/grocery store for nothing!)
7.)  1 piece of 4 mil coroplast (see above) sufficent to cut 2 pieces of 1" wide by 24" long for ailerons
8.)  2 control horns
9.)  2 Clevis connectors
10.)  One roll of 2" wide packing tape--your choice of color
11.)  Threaded pushrods.

Wing Dimensions

I would suggest using a piece of cardboard or some other to make a template for your ZagNutz wing.  The dimensions look like this…..

Figure 2

Figure 3

Position your template on the foam so that the wing tip is closest to the edge of the foam as pictured.  This will allow you to have some drop off that is large enough to make some smaller wings later on.  Just me being cheap.

Cutting The Wing

There is a "top" and a "bottom" to this method so follow closely or you'll end up with a trailing edge that won't meet.  Cut the bottom of the wing as you've drawn out around your template. 

DO NOT CUT THROUGH TO THE SECOND LAYER OF FOAM AT THE TRAILING EDGE!

You may cut through both layers at the tip and the root of the wing only.  When done with that, separate the drop at the trailing edge so that you can see the second layer of foam.  You will need to add 3/8" (about the width of a pencil) to the trailing edge you just cut for the top of the wing.  When done you will have a piece that when unfolded would look something like Figure 4.