awesome scientific method project?

i need an awesome project (around 8th grade level) that uses the scientific method. making something glow? making my own keyboard? help?

Comments

[The MadScientist]

You could go for the simple heat magnesium in a crucible over a Bunsen burner till it burns then measure the mass change from start to finish.

[iceng]

Reproduce a desktop of Michelson–Morley experiment should be easy to
demonstrate there is NO  "luminiferous aether" effect.. 

A