science fair solar energy?

ok so i have
cardboard box
4 silver reflector cards
1 black panel base with cover
1 bottle connector
1 soft wax, adhesive tape
2 thermal indicator stickers (printed 70 degrees Celsius (158 degrees farenheit) and 40 degrees celsius (104 degrees farenheit))
1 transparent plastic cover sheet
1 cap with two holes
1 transparent plastic tubing
1 small square and 1 large square paper
[and yes this is from a kit]
i also have [a different kit]
solar cell (photovoltaic cell)
disc with diffraction foil
solar motor

Can anyone tell me what i can build with all of this because i have a science fair in 1 month and i need to build something right aways (something that is not invented yet)
the first person to give the best advice will get 10 points!!!

I just wonder if you could reflect light down a dark tube and onto a solar cell at the bottom and power the motor. This could show how maybe solar panels do not have to be mounted on roofs if light can be reflected onto them somehow.

Here is a good video reference for the direction solar power is taking right now.