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This invention was initially created as a walking machine and then was tweaked to make the machine an amphibious in 1932 what is it?

The answer

the first bicycle ever invented was the walking machine which was invented by Baron von Drais in 1817 the walking machine had two same-size wheels front and back. Like a modern bike it was steerable in the front. Instead of peddling you would push with your feet. And the bike was made out of all wood.It is a bike go in water and land
we did research about other subject that were easy and hard but we tried hard and recapped on the the past lessens