In designing kites one must consider the pros and cons to each element of design. For example, one can eliminate the tail, but bow out the design for stability and thus achieve greater altitude. Other ways to achieve stability may be in the cover material, the sticks or frames, addition of wings or keels or using shaped wing surfaces. Rudders, airfoil-shaped surfaces and tapering are some other design possibilities. Decide on a shape or form.
Kites come in various shapes and forms.
Design the sticks and frames for the kite. Make sure it will be a strong frame but also be light weight. Choose the cover material. Strong but light. Choose how you will stabilize your kite.