The first thing you need is a clear jar or plastic bottle. Fill the bottle halfway with vegetable oil and add water to the top until it is almost full. After this is done, add at least five drops of food coloring. You will the need to take an Alka-Seltzer tablet and break it up into several pieces. The final step is to drop each piece in one at a time and watch as bubbles begin to form, activating your lava lamp.
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