Bicycles move when you push the pedals round with your feet.
Your feet turn the pedals, and a chain spins the back wheel. The faster you pedal, the faster you go!
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Cars use four wheels and an engine to zoom down the road.
Buses can carry lots of people to school and work all at the same time.
Motorbikes have two wheels and are very popular in Vietnam.
Trains run on metal tracks and can pull many carriages in a line.
Japan's bullet trains can zoom faster than 300 kilometres an hour.