Usually, science fairs would not allow to use "live creature"
for experiments in science projects. So, it has to be careful
while selecting the topics...
You might just check
http://www.ScienceOxygen.com/idea.html
It does not sell anything or tell you any answer or
give you any step-by-step details; it is just with the ideas
along with a collection of links so that it might trigger
some new ideas...
