The affect of a lit magnesium strip in aluminium oxide and iron oxide powder. Basiclly put the 2 oxides in a can add a mg strip and light it 
Other things
The affect of C02 on plants
light on plants (that is so easy and quick to do)
grow some mold
do something with lasers lasers are cool and with some detectors and polarised glass you could point out how to make a safe lock. you can do almost anything with lasers, i will leave you to looking up the lasers and polorised filters.
Other things
The affect of C02 on plants
light on plants (that is so easy and quick to do)
grow some mold
do something with lasers lasers are cool and with some detectors and polarised glass you could point out how to make a safe lock. you can do almost anything with lasers, i will leave you to looking up the lasers and polorised filters.