THE EVOLUTION OF BIKES

hello!, a couple days ago we read a book about how girls were not allowed to ride bikes .  after we read the book we made a slide show about the evolution of bikes.  what i found out from the research is that the are  lots of bikes  and many ideas for them like the penny farthing , the big wheel makes the penny farthing go super fast and the swift walker was more of a exsercise bike. the evolution has slight changes  but improve the bike a lot.