This has been a windy springtime in New York City, and we may as well take advantage of it. Here is a handy instructional guide from the American Kitefliers Association, which shows how easy it is to build a basic kite. The guide is posted on the website of Gomberg Kites, which sells things, and also has many free online resources for teaching artists, including this one on "How to Run a Kite Workshop".
All you need is a sheet of paper, a needle and thread, a stapler, and a hole-punch. It's a snap.