Jerry
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Progress
Innovation
Innovators
Serial Innovators
Inventors
Karl Drais
Dandy Horses (1817 Laufmaschine, Draisienne)
Bicycles (1880s)
Tricycles
Parents
Bicycles (1880s)
Children
Engelbart on Tricycles vs Bicycles
Pedal-powered Raht Racer cycle can travel as fast as a car
Raht (Rat) Racer (Recumbent Automotive Human Transport)
Tilting Three Wheelers
Tricycle.com
Wishbone Bike