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Complexity level:
9
Project cost ($):
20
Time required:
It will take an hour to set up the science experiment, and an hour to conduct it
Material availability:
Easily found at a hobby store.
Safety concerns:

Use only batteries. Do not connect to mains supply.  Conduct the experiment under supervision of a qualified person. Highly flammable gasses will be released. Ensure that protective gear is worn at all times.