To do this activity, you must have completed the activity in Lesson 1.

We suggest students work in groups of four. Homeschool students can work on their own, but will need help with some steps.

Remove the Steel Nail from the Salt & Vinegar Solution

At the end of the last lesson, you put all the pennies in the Salt & Vinegar solution, added a steel nail when students were gone, and then left the solution overnight. To prepare for this activity, check on that solution before class and look at the nail you put in. All or part of the nail should now be covered by a layer of copper.

Take the nail out of the solution, rinse it off, and set it aside to show your students during the last video. Save the penny-filled solution for students to use in this activity.

Prepare Materials for Classroom Distribution

Students will first need the following materials:

We then recommend you set up three supply stations around the classroom:

• Potion Pro & Penny Pro: Pennies in the Salt & Vinegar solution along with the spoons for scooping up pennies and one Dixie cup for each group
• Bag Boss: A Ziploc bag for each group
• Steel Master: A steel nail for each group

Have a Plastic Bin Ready to Store Student Experiments

If conditions are just right, copper forms on the steel quickly. But in many cases, students may need to leave their experiments for a few hours or even overnight to see results.

To store students' experiments overnight, we suggest taping or clipping the Ziploc bags to the sides of a plastic bin, with the bags hanging over the inside of the bin. This ensures that the nail remains submerged in the liquid. In the unlikely event that the bags leak, the bin will catch the vinegar.