Kar D.Sauerbronn invented the balance bicycle.
The bicycle
Roberta Sauerbronn was born on February 11, 1978, in Niteri, Rio de Janeiro, Brazil.
As A/B=C/D , So B=(A*D)/C
No Thomas Edison didn't invent the umbrella, but he did invent the phonograph and the light-bulb. :D
The Saddle
a hairbrush
William D. Oar
John D. Rockafeller
Yes Leonardo did invent the scissors... -Taylor D. S. Age:11
Shredded wheat cereal!! :d
Invent 3-D glasses.
Invent 3-D glasses.