Baking Soda Surprises

posted in: S.T.E.A.M | 0

Baking soda and vinegar. What could be better for a group of little boys?! My middle little is hosting a Science Birthday Party next week and I thought this would be a perfect experiment to conduct. To up the fun factor I hid some Lego parts in the baking soda part, that the boys will get to add to their treat bags. I gave it a test run this week to make sure the experiment would work and it was FANTASTIC!!


Materials + Supplies

  • Baking Soda
  • Water
  • Lego or Other Small Toy
  • Baking Sheet or Cooling Rack
  • Parchment Paper
  • Vinegar
  • Liquid Dish Soap
  • Tray or Bowl
  • Eye Dropper (Optional)
  1. Pour some baking soda into a mixing bowl. I just guessed at how much I would need (you can always add more if needed). Add just enough water to make a dry paste like mixture. You want the baking soda to hold together, but not be soupy.
  2. Grab a clump of the mixture + hide the Lego or toy inside. Squish it into a small ball + set on a baking sheet or cooling rack lined with parchment paper. I drew lines on my parchment paper, so that all the parts for each Lego Man were still together.
  3. Let the baking soda balls dry over night until hard.




4. To reveal the prize + see the fabulous reaction between the baking soda + vinegar, place the baking soda balls into a tray or bowl.

5. Add a small squirt of dish soap + either squirt the vinegar onto the baking soda with an eyedropper or you can pour it on using a measuring cup. The vinegar dissolves the baking soda with a bubbly, foamy awesomeness (the dish soap adds to the bubbles) to reveal the prize inside.


It worked out so well! I cannot wait to do at the Science Birthday Party with the boys!!


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