Here are some more ideas I found in case the previous one is not suitable:
- Will seeds still germinate if soaked in a liquid other than water?
- Does the colour of a candle affect the rate at which it burns?
- How does music affect heart rate?
- How do physical vibrations affect plant growth?
- Do plants grow better with sunlight or artificial light?
- Does the shape of a kite affect its flight?
- Does the colour of water affect its evaporation?
Anyways..gotta go!
BTW here's a list of some websites I found that were quite helpful:
- http://pbskids.org/zoom/activities/sci/
- http://chemistry.about.com/od/sciencefairprojects/
- http://www.juliantrubin.com/fairprojects.html
- http://www.cool-science-projects.com/