At Home Overnight Science Experiments

Shared By Our Friends At Learning Resources
October 14, 2020 by
At Home Overnight Science Experiments
School Aids, Inc, Elaine Swart

Each family in the United States has found themselves at home…for a while All this time has afforded us precious hours to do things we might not otherwise do. At Learning Resources, our minds turn toward STEM, and all the long-term experiments we might have put on the back burner simply due to a of lack of time  

Below are a few overnight experiments that take a while. But hey – time is on our side! 

The Naked Egg  

How can you make an egg stay fully intact without its shell? The answer is (to this and many things): science! 

You will need: 

  • Eggs 
  • Vinegar 
  • Cups 
  • Corn syrup (for later) 

All you have to do i s drop the eggs in, one per cup , and pour in the vinegar. The egg should be completely covered with the liquid. It’s okay if the egg floats a bit.

A chicken egg shell is made up of calcium bicarbonate. The acid  makeup  of the vinegar begins to react with the calcium of the egg shell. After just a short while, you will see bubbles appearing on the outside of the egg. This is carbon dioxide gas as a result from that reaction.

But now comes the hardest part: the waiting. It can take 12-24 hours before a good portion of the shell is removed. More bubbles and froth will appear.  

After the day of soaking, carefully r emove the egg from the vinegar The egg was soft, but still had a white, powdery coating. You can scrape it off, but  with the  egg  being so  delicate, it might break Be careful!  

We used a flashlight to find the yolk in the dark. The egg glowed something awesome, but the yolk was hard to pinpoint  

So we poured some fresh  vinegar in the cup, and soaked  it for another 12 hours  

The egg came out the next morning very rubbery and fragile. We slipped the naked egg into a cup filled with corn syrup and let that soak overnight. The results were amazing! Because the corn syrup has very little water content and the egg does, the water inside the egg begins to move across the membrane (“skin” layer) and starts to equalize. What’s left is a very baggy egg.

How to  Make a Rainbow Bouquet  

While you are grabbing essentials at your local big box store, why not grab a bouquet of fresh flowers? Creating your own rainbow bouquet can be turned into a fragrant scientific experiment over the course of a few nights A trick often used by florists, dyeing white roses or carnations with colored water is actually an example of capillary action, or the ability of a liquid to flow in narrow spaces against gravity

What you will need: 

  • White roses or carnations 
  • Scissors or knife (adults only!) 
  • Containers 
  • Food coloring and water 

Remove all the leaves from the stem of the flower. The experiment is to see how the colored water will travel to the white petals, so you don’t want water diverted to the leaves

 Once the roses are clean, have an adult snip or cut them with a knife at an angle, leaving about 6-7 inches (adults only!)  

Next, stir up the liquid your flowers will be drinking for the next few days. Decide on your colors and place about 10-15 drops of food coloring in each container. Add warm tap water until the containers are about halfway full. Stir well!  

Place your flowers in their containers. Here,  two were placed in each container.  


Recently snipped flowers can be pretty thirsty. This is what the stem and bud of the blue flower looked like after just three hours


The next morning, the tips of the flower petals (and most dry part of the flower) were beginning to show color. How deep will the color be with each passing day?



At the two-day mark, the colors were distinguishable, and the roses were thriving.


By the third day, the flowers were just beginning to wilt, but the colors were the most vibrant, but still a pastel hue

These roses were colored by capillary action. The colored water was pulled through the stem and made its way up to the petals Transpiration occurs when the colored water evaporates from the flower petals

Overnight Crystals 

Some crystals take several days to grow, but here’s a simple overnight recipe to get some great crystals grown right in your refrigerator  

You will need: 

  • Epsom salt 
  • Food coloring 
  • Clear glass cup 

Epsom salt is another name for magnesium sulfate.   

In the clear glass, fill ½ cup really hot tap water, then stir in ½ cup of the Epsom salt . Stir for at least one minute. While s ome  salt  crystals will  be not dissolved at the bottom of the glass, your stirring ha s created a saturated solution that’s ready to make crystals

Then add food coloring of you r  choice.   Place the glass in the refrigerator and wait until the morning!  


Wow! By cooling this solution rapidly, it encouraged fast crystal growth due to the dense solution. Crystals grown this way will be thin and plentiful.

Happy Overnight Science!

Odoo • Image and Text

About the Author: Stacy Flannery Armed with a practical approach, Stacy Flannery shares encouraging tips and “we-are-all-in-this-together” humor for raising kids in today’s world of high expectations. Flannery, an experienced magazine editor turned mompreneur, never imagined her two toughest bosses would be under three feet tall.

At Home Overnight Science Experiments
School Aids, Inc, Elaine Swart October 14, 2020
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