Fill a clear container a little over half way with vegetable oil then fill the rest up with water... |
Add ten drops of food coloring... |
Break an alka seltzer in half and add to the bottle. Watch the "lava" go! You can add more alka selzter pieces as the bubbles die down but if you put too much in at once, it gets cloudy. |
We also made a blue one |
You can put the lids on to make a more complete look although I think it's kind of a pointless step. |
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