Science Buddies: "Ask an Expert"

Hello,
i really need to know how to make an internal combustion motor( out of the cheapest materials if possible)
I really need to know how to build this asap as my science project is due in two weeks...

thank you in advance.

Hi Cami Kay,
Welcome to the ask an expert forum. Is this a topic chosen by you or assigned by a teacher? Building a true internal combustion engine by yourself in two weeks seems problematic because these can require moving parts made from heat resistant materials, complicated construction, and use of hazardous flammable fuels. If you have the option to adjust your topic, I would recommend considering some simpler external heat engines, such as these:
http://en.wikipedia.org/wiki/Aeolipile
http://en.wikipedia.org/wiki/Newcomen_steam_engine
http://www.bekkoame.ne.jp/~khirata/english/mk_can.htm

Chris