Go with the benign display instead of something which could be considered dangerous. You don't want to be held liable for any issues which could arise nor do you need the legal issues. Oxidizers are not to be misused especially if you are not a chemistry major. Just think of the issues which could arise and that should be enough to guide your actions.
Frankly I cannot understand why or how the school can just assign such an experiment w/o giving you a recipe & guidelines and perhaps some 'no-no's' to follow. These days the issues are safety & liability and then knowledge. You don't need the issues arising from someone being hurt.
Improper use and storage of oxidizers cause multiple fires and big-$$$$ losses every year not to mention harm to individuals.
Here's one episode of infamy in the history of tragedies involving the loss of life to firefighters that every well-trained firefighter learns-of.
http://www.nfpa.org/assets/files/pdf/texascity.pdf
It's estimated to be $681,000,000 as a loss in 2012 dollars. The
Grandcamp, the ship which exploded, was vaporized, not to be unexpected, when the method of destruction was basically similar to the Oklahoma City bombing, except instead of 3 tons of oxidizer, it was another 2297 tons of the oxidizer which ignited and killed well-over 400 people in the dick area. Subsequently, another ship in the area, the
High Flyer, also bearing a cargo of approx. 860 tons of the same oxidizer, also ignited and exploded, with the same destructive force completley destroying the ship to so-much shrapnel. Only one person lost his life as the area was evacuated prior to the blast once the ship fire was abandoned, it was a fire subsequent to the
Grandcamp's explosion.
Now I am not making any comparison to a science fair experiment and these tragedies, except to say, working with oxidizers is not for the untrained!
Read the NFPA description of the TX City event, it's almost too-big to be believed.
