Easy Christmas Lava Lamp Science Experiment

You don’t have to use mason jars for this science activity, but we love to use them in our science projects. You could also use beakers, a measuring cup, or regular cups. One fun twist on this experiment is to see how the mixture bubbles up in different sizes or shapes of containers.

Fill each jar about 1/2 of an inch full of water. Add red food coloring to one jar and green to the other.

Fill the jars up the rest of the way with vegetable oil (you can also use baby oil).

Wait for the mixture to separate. This is a good time to talk to the kids about liquid density and why the oil rises to the top.

Once the mixtures settle, break an Alka-Seltzer table into small pieces. Let the kids drop the pieces in one by one.

If they have never done this activity before, they will be quite excited.

If they have done it before, they will still love doing it again.

Talk to the kids about the chemical reaction happening between the acid and base mixtures in the tablet, and why that makes bubbles in the jar. When the tablet hits the water, the baking soda and citric acid in the tablet react, making carbon dioxide. This brings a bit of water along with the floating gas, creating lava lamp bubbles in the jar.

More Christmas Activities You’ll Love:

• Printable Christmas Paper Dolls
• Christmas Five Senses Book
• Christmas Tree CVC Word Building Mat

More Science Experiments to Try:

• Tornado in a Bottle Experiment
• Salt & Soda Reaction Experiment
• Frost in a Can Experiment