Each group needs:

• several 2-liter bottles of Diet Coke®
• 2 packages of Mentos® candy
• 1 Mentos® fountain, such as a "geyser loading tube" with multiple nozzles at http://www.stevespanglerscience.com/geyser-tube-fountain-fan-run.html
• Mentos Fountain Worksheet, one per student
• (optional) height-o-meter; learn about them at http://lhsgems.org/GEM306.html, including a design for a simple cardboard clinometer

For the entire class to share:

• capability to show an online video