What kind of project should i do on the human mouth

Answer 1

These sites may give you some ideas.

http://boingboing.net/2009/02/02/carved-watermelon-re.html

http://www.sciencedaily.com/releases/2008/08/080810214006.htm

http://users.forthnet.gr/ath/abyss/dep1111.htm

http://www.innerbody.com/image/dige01.html