Materials List: Get Your Charge Away from Me!

Each group needs:

  • test tube or other thin-walled, tall and clear vessel
  • enough oil to fill the vessel nearly to the top (such as any cooking oil)
  • eye dropper
  • several 4-8 oz (118-236 mL) cups
  • water (enough to fill ¾ of each cup)
  • food coloring (a couple of drops per water cup; water-based food coloring recommended)
  • liquid dish soap (a few mL at most)