A skateboard is a thin wooden platform on four wheels. It is used for sports and recreational activities. It is propelled with one foot by pushing off the ground while the other remains on the platform or using the incline of ramps or natural slopes. The first skateboard was made in the 1930s in America and was a surfboard attached to 4 wheels. Back then, the polyurethane that skateboard wheels are made of today hadn't been invented, so it was very dangerous due to poor traction and made a lot of noise. When he walked through the streets, everyone was angry and the police were in trouble. From the 1930s to the 1960s, skateboarding was banned. In the 1960s, it became popular among young people again and its mass production began.