A folding extension stool is portable, adjustable-height seat used for both indoors and outdoor activities, it's mainly uses include providing a convenient seat for camping, fishing and outdoor events, it also act as a safe step stool for reaching high places in a kitchen or closet, and offering a temporary and adjustable-height seat for children, they also designed to be lightweight and compact for easy carrying and storage. And a very portable seat for festivals, queues, concert, or park visit.