#14. Fluorescein.


Let’s break it down: Fluorescein is a fluorescent tracer that can be used in avariety of ways, from microscopy of biological organisms to understanding the flowof rivers. NASA also used this to find space capsules that landed in the ocean.This non-toxic bright green color can be created in a glass bowl of water afterthe fluorescein has been harvested from ordinary highlighters.

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#13. Oobleck.


Let’s break it down: Fluids and solids typically behave very differently from one another, but that’s not so with oobleck. A simple 2:1 ratio of starch and water, oobleck is known as a non-Newtonian fluid. While it has the regular, free-flowing attributes or an ordinary fluid most of the time, it firms up and acts like a solid when force is applied.

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#12. Dancing Oobleck.

Dancing Oobleck

Let’s break it down: Sure, sometimes applying force to oobleck in the form of punching or walking on it is pretty fun, but it’s also pretty mesmerizing to let sound waves control this slimy substance. In order to make this ooze dance, put oobleck on top of a speaker, and crank up the bass. The sound waves will push the oobleck into forming solid shapes as they dance around. If this isn’t hypnotizing enough for you, add in some food dye and watch the colors swirl together.

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#11. Freezing Water Instantly.

Freezing Water Instantly

Let’s break it down: If you’ve been dying to control ice just like Elsa, now’s your chance. Purified water is able to be cooled past freezing temperatures while staying as a liquid, as long as there isn’t a nucleus for the ice crystal to form, like an impurity in the water or another piece of ice, as shown. The water is so cold, that the introduction of an ice crystal causes a runaway freezing effect throughout all of the supercooled water.

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#10. Melting Spoon.

Melting Spoon

Let’s break it down: No, this spoon isn’t stirring a nice hot cup of acid or anything like that. The utensil is actually made out of gallium, which is a metal with a melting point of only 85 degrees Fahrenheit. By merely stirring a mug of water barely warm enough to steep tea, the metal actually melts and breaks apart easily.
You can also melt gallium just by holding it in your hand, as your body temperature is enough to reduce the metal to a puddle. It’s kind of like what your parents did with mercury, but a whole lot less toxic.

Learn how to do it yourself here.