A kids scooter or push scooter, originally scooter, is a human powered vehicle with a handle bar, deck and wheels that is propelled by a rider pushing off the ground. The most common kids scooters today have two hard small wheels, are made primarily of aluminum and fold for convenience. Some kick scooters that are made for younger children have 3 or 4 wheels and are made of plastic or do not fold. High performance racing scooters made for adults resemble the old money with much larger wheel in front.
Mod edit: we don't need plagiarism mis-quotes taken from Wikipedia that serve no useful purpose, thank you.