Take wakeboarding, ditch the boat, add a parabolic kite tethered by 100-foot lines, toss in some wind, and you get kiteboarding, a sport born in the late 1990s that is currently exploding in popularity. Despite the extreme show put on by experienced kiters—who can handle 1000 pounds of force, reach speeds topping 50 mph and fly 50 feet above the water—the sport is surprisingly easy to learn. Most people pick it up after just a couple days of lessons. Here are the skills and gear you need to get started. Learning Progression 1 Land Lesson "Ninety percent of kiteboarding is...