Materials:

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

Instructions:

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.