Editing Vortex Cannon (section)

== Demonstration ==

# If you brought the fog machine, plug it in and let it warm up. Set up the cups in a pyramid on a table 10 feet away.
# Show the students the vortex cannon, and use it to knock over the pyramid. Feel free to aim it at the students as well, and try to blow off hats if students are wearing any!
# Use the fog machine to put a small amount of fog inside the vortex cannon. Fire the vortex cannon towards the students so they see the smoke rings form!
# If doing a hands-on night, allow the students to come up and try to fire the cannon at single cups or the pyramid.
#* If doing a stage show, ask the audience to explain what causes the rings to form. Why does the vortex cannon make smoke rings instead of a jet of smoke?