Amazon.com description: Product Description: Did you know that street skateboarders perform incredible tricks by creating obstacles out of structures you might find along a city sidewalk? Street skateboarders jump their boards onto curbs and stairs. They grind down railings. They flip their boards around with their toes. Enter the Extreme Summer Sports Zone to learn about the history, gear, moves, competitions, and top athletes connected to skateboarding street. You'll learn: Why one of the top street skateboarders of all time always wore knee pads. Why Alan Gelfand's ollie trick changed street skateboarding forever. What some of the awesome tricks you might see a pro street skateboarder do are. What the biggest street skateboarding competitions are. Are you into sports? Then get in the zone!