MBK 2-Skewer Box
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!
The instructions on how to build a box kite might look quite long, but each step is simple to do. Just quickly work your way through, skimming over any detail that you don't need. All in all, it should be quite hard to make a mistake!
If made from 30 cm (12 in.) skewers, the MBK 2-Skewer Box kite is not huge at 58 cm (23 in.) long, with cell panels measuring about 17 cm x 20 cm (7 in. x 8 in.).
This box design is a moderate-to-fresh-wind flyer and requires no tail. That is, unless you are flying in a storm, which is not recommended anyway! If accurately made, this kite can cope with quite strong wind.
I have an enduring memory of flying this kite on a really windy day. The skewers were bending but nothing broke. And then, as I looked across the ground, my wind meter on its little tripod got blown over. That's breezy!