Teacher demo:

• Sheet of aluminum foil
• Small amount of clay

Each group needs:

• 1-2 aluminum cans (have a consistent size of aluminum can for each group).
• 4 sheets of paper
• cardboard folder
• foam cup
• 1 m (~3 ft) of masking tape (total of 3-4 rolls per class)

For the class to share:

• Crash apparatus (such as a heavy ball or weighted toy car rolling down ramp). The crash apparatus might be a ramp set up for a heavy ball or car to roll down into the “parked car” (aluminum can) set against a wall, for example. Most importantly, the crash apparatus needs to be set up so each “crash” is able to be repeated with consistent speeds and forces.