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Lava Bottles

Who said science can't also be cool? When you and the kids find yourselves bored on the next rainy day, here's a cool science trick that is as much fun as it is educational. Acids and bases, oil and water... it’s two science experiments in one groovy project. Plus, it's neat to watch!

Shop at Dollar Tree – Here's What You'll Need:

  • Clean Plastic Bottle
  • White Vinegar
  • Vegetable Oil
  • Food Coloring
  • Baking Soda

Easy Step-by-Step Directions:

  1. Pour white, distilled vinegar into the bottle until it’s about ¼ full.
  2. Add food coloring of your choice (except yellow... it doesn't show up in the oil!).
  3. Fill the bottle with oil until it’s about ¾ full (Note: if you fill it too much, the mixture will bubble over, making a big mess!).
  4. Add about ½-teaspoon of baking soda to the bottle. It will briefly rest on the surface of the oil before dropping through the vinegar, causing a chemical reaction and sending colored and clear bubbles up to the surface, before sinking back to the bottom. (Note: do this in a protected space, such as outside or near a sink, in case the reaction goes REALLY well. If you've left enough space in the top of the bottle, everything should stay contained in the bottle.) 
  5. Once the reaction has finished, put the cap back on the bottle for next time.