This is an old favorite that’s a staple at science fairs. (Be sure to supervise young children.)
- The Ingredients needed are as follows:
- Cardboard
- 3 (4 ounce) plastic cups
- Plaster-of-Paris
- 1⁄4 cup vinegar
- Few drops of hand dishwashing liquid
- Few drops of water
- Few drops of red food coloring
- 1 teaspoon ARM & HAMMER® Baking Soda
- On baking sheet (or other easily cleaned surface), shape cardboard into broad cone shape using a cup to form a “crater” at the top of the volcano.
- Use Plaster-of-Paris over the cone to form the volcano (do not get plaster into the crater). Allow volcano to dry completely.
- Paint or decorate volcano as desired.
- Mix vinegar with dishwashing liquid, water, and red food coloring in a plastic cup.
- Put ARM & HAMMER® Baking Soda into a small, empty plastic cup. Place this cup inside the volcano crater.
- Quickly pour vinegar mixture into the ARM & HAMMER® Baking Soda cup in the crater. Enjoy the “lava” as the volcano erupts!
- EXPLANATION : The ARM & HAMMER® Baking Soda reacts with the vinegar in the mixture and produces a gas: carbon dioxide (CO2). The gas releases bubbles through the dishwashing liquid and food coloring, creating the bubbly, red lava.
