Skip to Content

Valentine’s Day Lava Lamp Science Experiment

Save this idea for later so you don't forget to use it!

Learn about science this Valentine’s Day with this fun Valentine lava lamp science experiment! Kids will have a blast with this Valentines STEM activity!

You know what my kids love? Things that fizz and bubble. They are delighted to play with anything that is fizzy.

One of our favorite activities are lava lamps, not only because they are fizzy, but also because they are an easy way to show kids how gasses can move through liquids and make bubbles. 

The lava lamp science experiment is a fun way to explain how their burps work, and if your kids are anything like mine, they are oddly fascinated by burping.

Learn about science this Valentine's Day with this fun Valentine's themed lava lamp science experiment! Kids will have a blast with this!

Valentine’s Day Lava Lamp Science Experiment

This fun lava lamp science experiment will keep your kids happy this Valentine’s Day! You can make this lava lamp any time of year, but using red and pink colors make it fun for Valentine’s Day science!

Lava Lamp Science Experiment Explanation

Learn about science this Valentine's Day with this fun Valentine's themed lava lamp science experiment! Kids will have a blast with this!

Oil is less dense than water, so it remains on the surface of the colored water. Additionally, inter-molecular polarity prevents oil and water from mixing (oil molecules are not attracted to water molecules).

But, when you add alka seltzer tablets, which contain citric acid and baking soda that react when placed in water, creating carbon dioxide.  The gas is less dense than either the water or the oil, but the gas bubbles take some of the water with them.

Then, when the gas rises to the top of the oil, the heavier water drops back down, creating a bubbling lava lamp effect.

What you’ll need for the Valentine’s Day lava lamp science experiment:

Gather these supplies before getting started on your lava lamp science experiment!

Here is what you will need:

valentine stem calendar
Learn about science this Valentine's Day with this fun Valentine's themed lava lamp science experiment! Kids will have a blast with this!

Step By Step Directions to Do the Valentine's Day Lava Lamp Experiment

Prep Time: 5 minutes
Activity Time: 10 minutes
Additional Time: 10 minutes
Total Time: 25 minutes

Making a lava lamp is a lot of fun! Here is how to do the lava lamp science experiment in your own kitchen or the classroom!

Add fun glitter, red, pink, or purple colors, and heart confetti to make it fun for Valentine's Day!

Ingredients

  • Science beaker (or you can use a cup or jar)
  • Pink food coloring
  • White glitter
  • Alka seltzer tablets
  • Water
  • Vegetable oil or baby oil

Instructions

    1. First, fill the beaker 3/4 of the way full with oil. Add about a 1/3 inch line of pink water to the cup.
    2. Add white glitter to the jar for extra sparkle. You can also add heart confetti.
    3. Place the jar on a surface where kids can look at it at eye-level.
    4. Drop in a quarter of an Alka seltzer tablet into the jar. Watch the bubbles fly high! The more tablet you put in, the more vigorously it will boil.
    5. You can repeat this activity for as long as you have tablets!

Notes

My kids love doing lava lamp experiments so much that they try to use an entire box of tablets in one day (which is why I buy my Alka seltzer tablets in bulk).

Recommended Products

As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.

The dancing candy heart experiment works the same way, just with different materials!

valentine stem calendar

More Valentine Activities for Kids

Creative Valentine Engineering Challenges

Printable STEM Valentines for Kids

Valentine Candy Science Experiments

Elementary Valentine STEM Challenges

Save this idea for later so you don't forget to use it!

Skip to Recipe