Dear all,

I found some websites that could help in your search for a topic. Here are the websites below, if you want more, just Google science fair topics ideas for Middle school 

http://www.juliantrubin.com/branchesofsciencefair.html

Examples are:

http://www.juliantrubin.com/foodprojects.html

http://www.juliantrubin.com/topicprojects/interdisciplinarytopics.html--

http://www.juliantrubin.com/fairprojects/genetics/human_genetics.html

http://www.juliantrubin.com/fairprojects/earthsciences/earthquakes.html

This is interesting site too; you can type in the search box whatever branch of science you are interested in.

http://all-science-fair-projects.com/science_fair_projects.php?s_terms=Food%20Science%20&type=0&s_difficulty=&hidden=1&s_category=