This clever invention has a a wikipedia definition; It is a human powered,pedal driven,single track vehicle having two wheels attached to a frame,one behind the other.
Introduced in the 19th century in Europe currently numbers to a billion around the globe.
My first introduction to a bicycle and falling off it was in the fifties.
I went to school 2 miles away on a bicycle.
A band new raleigh road bike in 1962 cost RM 90.00.