If you wish to use this experiment, here are some tips to ensure its success:
First, the jello must be extra stiff, with double the normal amount of gelatin ("Knox Blocks" or "Jello Jigglers"). I use fruit juice with 1 package of Knox gelatin for each cup of juice. Second, use a pan with weak sides. I usually use a disposable aluminum pan. If you use a pan with rigid sides, such as glass, you could hit the sides with a hammer and still not make much of a wave in it. Third, the jello should come close to the top of the pan. I use 6 cups of juice (and 6 packets of gelatin) for an 8"x8" pan which puts it within inches of the top of the pan. This helps the waves to form and makes them more visible.
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