Roller skate/skateboard/extreme sports
Roller skating, skateboarding, and extreme sports are exciting and challenging sports. roller skating is usually on a smooth surface, through sliding and performing tricks to show their talents. skateboarding is a variety of tricks and performances on the skatepark, which requires superb balance and quick response. extreme sports include high-altitude jumping, cross-country skateboarding, bmx, etc., which require extremely high technology and courage. these sports are highly entertaining and challenging, and are deeply loved by young people.