In these webpages you can read and learn about the history of the bycicle.
http://www.pedalinghistory.com/PHhistory.html
http://library.thinkquest.org/J002670/past2.htm
Using http://www.dipity.com/, create your own timeline about this populat invention.
You can use too http://www.timetoast.com/
Paste the result in your portfolio.