• A Cleaned Clear Bottle (Preferably One With Smooth Sides)
  • Water
  • Vegetable Oil/ Mineral Oil/ Baby Oil
  • Fizzing Tablets (e.g. Alka Seltzer)
  • Food Coloring


  1. Fill the bottle about 1/4th full with water.
  2. Pour your oil into the bottle until it is almost full. If needed, use a funnel or spout to pour the oil into the Bottle. Wait for the water and oil to separate.
  3. Using your favorite color of food coloring, add a few drops into the bottle. Watch the color sink through the oil.
  4. Break your fizzy tablets in half and drop them into the bottle. Watch as the bottle bubbles!
  • If you want, try this with the lights turned off! Drop the tablet in, then use a flashlight to shine through the bottle. 

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