Straw Cartesian Diver
It just can’t get much more simple than this… a bendy straw and paperclip. As always, the key is to experiment with the materials you […]
Easy Science Experiments
Density
Diving Ketchup - Clever Cartesian Diver
Did you know that you can cause a packet of ketchup to rise and fall on command in a bottle of water? People might even […]
Cartesian Diver Toys - Hook the Sinker
Hook is an amazing game that combines cool science with coordination and skill. You’ll make a special diver, float it in a soda bottle tank […]
Sugar Rainbow - Stacking Liquids in a Straw
Explore the science of density as you learn how liquids of different densities stack on top each other. A simple combination of some sugar and […]
Floating Bowling Balls
We all know that certain things float in water while other things sink, but why? Do all heavy things sink? Why does a penny sink […]
Five Divers
We’ve found an awesome new science activity that uses Cartesian divers. This project features five individual Cartesian divers, and they’re all in the same bottle. […]
Growing and Shrinking Egg
We’ve found a method to take our famous Naked Egg experiment to a new level. By dropping your Naked Eggs into Karo corn syrup or […]
Sinking Soda Surprise
I remember as a kid diving to the bottom of the swimming pool to retrieve unopened cans of soda pop. Our parents tossed the unopened […]
Oil and Water
There’s something very important about oil and water that you probably already know: oil doesn’t mix with water! That explains why oil spills on the ocean float on […]
CO2 Fire Extinguisher
Carbon dioxide (CO2) is a gas that humans interact with every day. For instance, you exhale it from your lungs. Drive a vehicle and it’s in the engine […]
Invisible Soda
A glass of cold milk goes great with a lot of things: cereal, cookies, cakes, pies, etc. However, it’s not such a good match-up with […]
Burping Bottle
Did you know that the majority of burps are simply caused by swallowed air? It’s true! Burping is a natural human phenomenon, but it’s also […]
Perfect Fake Blood - 5 Easy Recipes
A few gallons of fake blood are just the ticket for your Halloween haunted house, for some innocent pranks, or for emergency preparedness training. The problem is […]
Liquid Layers - Salt Water Density Straw
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, […]
Bubbling Blob - Lava Lamp
Learn how to make a wave bottle using oil, water, and a secret ingredient that makes the whole thing fizz, bubble, and erupt.
Soap Soufflé
Ivory soap . . . it’s the soap that floats. But why? discover the secret behind this floating sensation by cooking the whole bar of […]
Eye Dropper Cartesian Diver
Is it mind control or just a clever science trick? It’s a classic science experiment using an eye-dropper, a soda bottle filled with water, and […]
Dancing Spaghetti
Who taught these noodles to dance? Go on – gather up some pasta noodles, turn up the music, and get ready for an old-fashioned pasta […]
Magic Spheres - Science of Density
Science is not magic but magic definitely needs science. Say this to your friends, “Let’s make this metal ball bearing become a featherweight plastic sphere.” […]
Light Ice, Heavy Water
You know that materials have different densities. For a perfect, amazing example of how to demonstrate these different densities, check out our 9 Layer Density […]
Borax Crystal Ornaments
Bringing real snowflakes inside one-at-a-time is next to impossible. The snowy globs on your shoes and gloves don’t count, either. So, to work around this […]
Dry Ice Floating Bubbles
Exploration into the fascinating world of dry ice is never boring, and the same goes when you add in some bubbles! Bubbles will float on […]
Balloon Expansion
Here’s a great way to actually see how air fills more space and then less space as its temperature changes back and forth between warmer and cooler. You can easily […]
Amazing 9 Layer Density Tower
With this science magic trick, you’ll put a new spin on our famous Seven-Layer Density Column demonstration. First, you’ll discover how to stack seven or […]