Every once in a while I have tried to design a circle kite and even encouraged my students to do so. Thats an easy and fun task, flying how ever turned a circle-shaped kite is not so easy. The people of Guatemala have an ancient tradition of creating giant circle kites at the All Saints Day Kite Festival during the Day of the Dead celebration (picture underneath belongs to that website). That must be the ultimate event for every kite enthusiast to attend.
However, these days I am construction a Hawaiian moon kite with one of my students. Material: Chinese paper, bambus. The first 80 minutes we spend on choosing the material, constructing the sail and experimenting with ink. I mostly use the book “DuMonts Bastelbuch der Drachen” with construction guidelides https://www.amazon.de/DuMonts-Bastelbuch-Drachen-Flugtechnik-Konstruktion/dp/3770109465