A kick scooter (also referred to as a push-scooter or scooter) is a human-powered street vehicle with a handlebar, deck, and wheels propelled by a rider pushing off the ground with their leg. Today the most common scooters are made of aluminum, titanium, and steel. Some kick scooters made for younger children have 3 to 4 wheels (but most common ones have 2 wheels) and are made of plastic and do not fold. High-performance kickbikes are also made. Motorized scooters, historically powered by internal combustion engines, and more recently electric motors, are self-propelled kick scooters capable of speeds sometimes exceeding . Models and history Early scooters Kick scooters have been handmade in industrial urban areas in Europe and the United States since the 1920s or earlier, often as play items made for children to roam the streets. One common home-made version is made by attaching roller skate wheelsets to a board with some kind of handle, usually an old box. To turn, riders can lean or use a second board connected by a crude pivot. The construction was all wood, with 3–4 inch (75–100 mm) wheels containing steel ball bearings. An additional advantage of this construction was a loud noise, like from a "real" vehicle. An alternative construction consists of one steel clamp on a roller skate divided into front and rear parts and attached to a wood beam. The German Bundesarchiv for "roller" details that both homemade and manufactured children's scooters were used and even raced in Paris, Berlin and Leipzig in 1930, 1948 and 1951. They are similar to later designs. The short movie "A Trip Through the Streets of Amsterdam" from 1922 shows several children on scooters. Kick scooter In 1974, the Honda company made the Kick 'n Go(ja), a scooter driven by a pedal on a lever. While it seemed to be as much effort to "kick" as a regular scooter, the novelty of it caught on and it became popular nevertheless. And the use of kick scooters for commuting can also solve many problems. Pneumatic tires Before bicycles became popular among children, steel scooters with two small bicycle wheels were more common. Around 1987, many BMX manufacturers produced BMX-like scooters, such as Scoot. Those manufacturers discontinued their scooters, but some scooter manufacturers were established in later years and remain in business. These scooters are still used in dense urban areas for utility purposes, since they