For this Rokkaku, you need long lengths of 5mm (3/16") wooden dowel.
Enough for the 3 spars of 1.0DL (120cm, 48") each. They are easily cut
to the lengths required with a small cheap hack-saw.
Prepare 10 lengths of electrical insulation tape, each
one about four times longer than it is wide. Stick them by a corner onto
something handy like a table edge. You can remove them one at a time as
needed.
As mentioned earlier, there's more kite-making on this site than you can poke a stick at :-)
Want to know the most convenient way of using it all?
The Big MBK E-book Bundle is a collection of downloads - printable PDF files which provide step-by-step instructions for many kites large and small...
Every kite in every MBK series.