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Pumpkin Volcano

This Fizzy Exploding Pumpkin Volcano Science Experiment is the Perfect Fall Activity

  • Pumpkins
  • Baking soda
  • Vinegar
  • Food Coloring
  • Popsicle stick or spoon for mixing
  • Sharp knife
  • Spoon
  • Large baking dish or container for eliminating mess
  1. Begin by using a sharp knife to carefully cut around and remove the top of your pumpkin. Adults should do this step for the children.
  2. Remove the top from the pumpkin, and use a spoon to scrape out all of the seeds and pulp, until the inside of the pumpkin is mostly cleaned out.
  3. Fill two cups up with vinegar. Or use as much as you want for exploding fun.

  4. Add food coloring to your cups of vinegar. You can use a popsicle stick or spoon to stir the colors and disperse them completely into the vinegar.

  5. Place small pumpkins into a baking dish with high sides or another container. This will help to catch the mess when the fizzing effect overflows and makes for easy cleanup.

  6. Put some baking soda into the bottom of each pumpkin. You can use at least 2 tablespoons.
  7. Pour the colored vinegar into the pumpkins over top of the baking soda. Watch as a fizzing reaction occurs and bubbles over. You can stir the baking soda left in the bottom of each pumpkin to cause another smaller reaction, or even pour more baking soda on top.