- Clear bottles (we used old Gatorade bottles)
- Canola Oil
- Tap water
- Food coloring
- Alka Seltzer tablets
- A flashlight
Fill the bottle 1/4 full of water and the rest of the way with Canola oil. (leave about 1" at the top)
Place 5-8 drops of water based food coloring in the bottle and let them settle to the bottom.
Drop in an Alka Seltzer tablet, close the bottle and place your flashlight below and enjoy!
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