Homemade Lava Lamp

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3 empty water bottles
food coloring
vegetable oil
alka seltzer

Fill each bottle a little more than half with oil. Then fill the rest of the way with water. Leave about an inch at the top.

Now add 10 drops of food coloring

Break your Alka Seltzer into 4 pieces and drop them in one piece at a time. Wait until the first piece stops bubbling before you drop in the next. If too many go in, your solution gets all cloudy

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