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  • Liquid Layers

Liquid Layers

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Quick Overview

Use knowledge of density to create a colorful rainbow inside of a drinking straw in this science experiment.

Availability: In stock


Density can be a difficult scientific property to grasp. With that in mind, we found a way to make the science of density a colorful, fun, and (most importantly) simple experience! The Liquid Layers project is the epitome of kitchen science. You'll use kitchen-safe materials to make science accessible and fun. It's quite the kid-friendly experiment when you create a colorful experience that will have young scientists understanding density in moments.

Everything you need to perform the Liquid Layers science experiment comes with the kit or can easily be gathered from your kitchen or classroom. We will walk you through the step-by-step process with the included activity guide and help make science a subject that brings excitement and fun to the table with the taking it further video!

DON'T FORGET! Like with all of our Sick Science kits, you'll receive a URL link and QR code to access the experiment video, as well as an exclusive Take It Further video featuring Steve Spangler!

What's Included?

Liquid Layers kit

  • 125 g of Table Salt
  • Baby Soda Bottle rack
  • 6 Baby Soda Bottles with caps
  • 2 plastic drinking straws
  • 6 - 9oz plastic cups
  • 12-pack of Color Fizzer tablets
  • Experiment and Take It Further video
    (URL link and QR code)
  • Blue scoop
  • Step-by-step, color activity guide

What Does It Teach?

The Sick Science!™ series covers a ton of science from a broad spectrum of fields. From optical illusions and color mixing to centripetal force and physics, you can find a use for every experiment in the series. Each Sick Science! kit provides young scientists an opportunity to explore the world around them and engage with the properties that make science so amazing.


Science Fair Connection:

You may have mastered the Liquid Layers experiment, but now it is time to turn this experiment into a science fair project. You can make it one simply by identifying a variable (something that might change the outcome) in the experiment, then testing that variable, and correctly reporting the results.


  • Try using something besides salt. Would sugar work the same?

  • Instead of using salt water, try different liquids to see if you can layer them.


These are just a couple of ideas, but you are not limited to just them! Come up with different ideas of variables to test and give them a try. Remember, you can only change one variable at a time for each test. For example, if you are testing different liquids, make sure that all other factors in the test remain the same!

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