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This is an oldie but a goodie.
Add 1/2 cup of corn starch with 1/4 cup of water.
Mix until substance is consistent
You'll need an amped speaker.
I used an 8 inch amped sub.
You'll need to generate a Sine Wave. You can download free programs that can make a Sine Wave. I used 60HZ.
I used red food coloring at the end.
It may take a little trial and error but it's worth it. :D Good luck!