MBK 1-Skewer Rokkaku
You might already have some of the simple tools and materials required.
Anything you don't have is easily bought. If not exactly what I used, then at least something pretty similar!
These instructions on how to make a Rokkaku kite might look a bit long, but each step is quite simple to do.
Just steadily work your way through from top to bottom, skimming over any detail that you don't need.
At 29cm (11 1/2") across, the MBK 1-Skewer Rokkaku is a rather small Rok. This kite has dihedral, a 2-leg bridle and a long streamer tail which keeps it stable in moderate winds. Feel free to experiment a bit with the amount of tail - you can fly in stronger winds with even more tail.
The vertical spar is 1.4SL (40.6cm, 16") long, so two 30cm (12") bamboo BBQ skewers need to be glued together.