• Vegetable Oil
• Water
• Food coloring – primary colors or neon
• Original Alka Seltzer tablets

To begin, color about 1/2 cup of water with food coloring.

Take the Alka Seltzer tablets and break them into 2 or 3 pieces. Place them in a separate small cup or container for later.

Fill a 2nd glass about 3/4 full with vegetable oil. Then pour in the colored water you made until the liquid in the cup is about 1-2 inches from the top.

Add the Alka Seltzer to the oil and water mixture and watch the bubbles!

Why this Science Experiment Works:

The water and oil do not mix and the oil doesn’t change color because the food coloring is water soluble. The Alka Seltzer reacts with the water to make bubbles of carbon dioxide. The bubbles attach themselves to the blobs of colored water and bring them to the top of the glass. When the bubbles pop the blobs of colored water fall back to the bottom of the glass.