For much of man's history on earth, he had two choices for getting around, either on foot or on the back of an animal (such as horses, mules, and wooly mammoths). Bicycles wer
…e developed to add another transportation option that multiplied human efficiency by a factor of approximately five. Originally, they were toys for the wealthy, but they soon became the first widely affordable means of personal transportation, enabling people to work, study, or socialize outside walking distance from their homes. Later, they became toys again, when people started riding for fun, for sport and for competition. Same reason that anyone has ever invented anything - He thought it'd be a good idea that would provide either more fun or more usefullness. Same reason anyone has ever invented anything. A person comes up with an idea, which is then turned into a prototype. If the prototype works, then more are built. For a cheap method of transportation, or just for fun. The same reason as anything ever gets invented; someone had a bright idea and the necessary skills and know-how to make it a reality. There is often no motive behind inventions. They are quirks of the imagination. It is not usually until something is invented that people find a need for it! (MORE) 
