Unfortunately there is not an easy way to
extract the compound you need (sodium alginate)
from kelp. It is a rather complex procedure.
But, that doesn't mean you can't make agar plates
on your own.
You can buy agar at most health food stores
(it is also called agar-agar) and you can make the
plates with soup broth. The trickiest part is
sterilizing the plates, which requires a pressure
cooker. Pressure cookers can be dangerous and
would definitely require that you work with an
Good luck on your project!
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