Can you give a new and cool concept for a investigatory project in physics or chemistry?

Can you give a new and cool concept for a investigatory project in physics or chemistry?
Sure! Calculate the energy savings per year from lowering your water heater temperature from 160F (where your dad set it) to 110F (where it should be set).
Here's another: Design a new spacecraft heatshield.
Here's another: When coal took over from wood-burning heating, there were some very innovative wood-burning furnaces. Dig up the technology and adapt it to modern use.
Here's another: How can you REALLY save gas? Do any of those gas-saving gimmicks work? Use a gasoline powered generator for accurate numbers.
Here's another: Simulate a Martian environment and see what grows.
Here's another: Invent some cool way to clear space-junk from orbit.
Here's another: Many people say that breaking up an incoming asteroid or comet is the wrong idea. Prove them wrong. (They ARE wrong!)
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