Wack-A-Packs are fun favors that are perennial favorites for the holidays. So what’s inside that makes it inflate? 

Remember those grade school science projects that made a volcano erupt? That’s what a wack-a-pack is! Just 3 simple house hold ingredients:

  • Baking Soda (sodium bicarbonate)
  • Vinegar (citric acid)
  • Distilled water

The simple reaction when the ingredients are mixed together is what makes the bag inflate. Just wack the pack on a steady flat surface to activate.

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