How do people invent things

1
       The invention of the  computre took more than one hundred years   to complete .Charls Babbage designed the first computer way back in the 1830s.It would be built with brass and run on steam power. Yet in those days , it was too big and too complicated to build . But in time ,other people used his ideas to invent the modern computer  


2
  Wilbur and Orvil Wright were inventors from their childhood .they         become interested in flying , so they decided to build a flying machine.   They tested 200 wing models before they made one that worked .They tested their airplane many times before their first five –minutes flight 

 Fariba Khoshmanesh , a member