Jerry
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Stages of Diffusion
Innovators
Serial Innovators
Inventors
Karl Drais
Dandy Horses (1817 Laufmaschine, Draisienne)
Bicycles (1880s)
Articles About Bicycles
Bicycling Science
Attachments
www.amazon.com
Parents
Articles About Bicycles
David Gordon Wilson
Children
Down With Training Wheels
It’s hard to see how training wheels can inculcate any of the desired balancing habits, unless they are off the ground.