If your house is anything like mine, you’ve heard the dreaded “I’m boooored” approximately 47 times today. You could hand them a tablet, or you could throw on some safety goggles (or swimming goggles, we don’t judge) and create a mess so epic they’ll forget they even own a smartphone.
I’ve tested these 12 wacky experiments on my own kids in my very own kitchen. Some ended with squeals of delight, and one ended with a ceiling stained purple for three weeks. I’ll let you guess which one that was. :/
So, roll up your sleeves. We’re about to turn your kitchen into a lab.
1. The Exploding Sandwich Bag
Chemical Reactions on the Cheap
Ever wondered how many times you can clean baking soda off your patio furniture before your spouse notices? Me neither. But this experiment is the perfect gateway drug to science.
- What you need: A sandwich bag, baking soda, warm water, and vinegar.
- The trick: You need to act fast. Put 1/4 cup of warm water into the bag. Add 1/2 cup of vinegar. Wrap the baking soda in a tissue (this is the time-release mechanism). Shove the tissue in the bag, zip it tight, and run.
Why it works: The acid (vinegar) and the base (baking soda) create carbon dioxide. The bag expands until it can’t take the pressure anymore. Boom. Instant entertainment.
Pro Tip: Do this outside. I learned this the hard way while mopping my kitchen floor.
2. Make Your Own Lava Lamp
Density is a Trip
Remember those expensive lava lamps from the mall? We can make one with stuff in your pantry. It’s mesmerizing. Even I sat and stared at it for twenty minutes.
- Grab these items: A clear plastic bottle, vegetable oil, water, food coloring, and Alka-Seltzer tablets.
- The process: Fill the bottle about 1/4 full with water. Fill the rest to the top with oil. Wait for the oil and water to separate. Drop in 10 drops of food coloring (it will bead up in the oil, then break through). Break an Alka-Seltzer tablet into pieces and drop them in.
Watch the magic: The tablet creates gas, which bubbles up through the oil, carrying colored water with it. When the gas escapes at the top, the water falls back down.
IMO, this is the best rainy-day activity. It’s quiet, which is a rare commodity in a house with kids.
3. DIY Glow-in-the-Dark Jell-O
Edible Science
If you’re going to make a mess, you might as well make a tasty mess. This one feels like a magic trick. The kids think it’s witchcraft, but it’s just science.
The secret ingredient: Tonic water. It contains quinine, which glows under black light.
- The recipe: Make a box of lime or lemon Jell-O. Instead of tap water, use tonic water. Chill until firm.
- The reveal: Turn off the lights and shine a black light on it.
Warning: The Jell-O tastes slightly different because of the tonic water. It’s a little bitter. My kids didn’t notice, but my husband spit it out dramatically. So, maybe don’t serve this at a dinner party.
4. Elephant Toothpaste
Foamageddon
You’ve seen this one on YouTube. It’s the one where a massive tube of foam erupts from a bottle. It looks dangerous because it’s so massive, but the kid-safe version is totally doable.
Grab these:
- A 16oz plastic bottle
- 1/2 cup 20-volume hydrogen peroxide (you have to get this at a beauty supply store—the brown bottle from the drugstore is too weak)
- 1 packet of dry yeast
- 3 tablespoons of warm water
- Dish soap
- Food coloring
Let’s go:
- Pour the peroxide into the bottle. Add a squirt of dish soap and some food coloring. Swish it around.
- In a separate cup, mix the yeast and warm water.
- Pour the yeast mixture into the bottle and step back.
The reaction creates tons of oxygen bubbles, pushing out a giant column of foam that looks like toothpaste for an elephant.
FYI: Do this in a baking dish. The foam keeps coming. And coming. It’s warm to the touch, too, which always freaks the kids out in the best way.
5. Magic Milk Fireworks
Surface Tension Explored
This is the least messy, highest reward experiment on the list. It’s almost impossible to screw up, which is my favorite kind of experiment.
- The Setup: Pour whole milk into a shallow dish. Drop in different colors of food coloring.
- The Action: Dip a cotton swab in dish soap. Touch it to the center of the milk.
The Result: The colors will explode away from the swab, swirling and mixing like a firework display. It’s instant gratification.
Why? Milk has fat in it. The soap tries to attach to the fat, but it moves so fast it pushes the food coloring around. It’s a great way to explain why we wash our hands with soap, too. Soap grabs onto grease (fat) to rinse it away.
6. Walking Water
Capillary Action for the Win
This one takes a few hours, but the payoff is worth it. You set it up, walk away, and come back to a rainbow.
Here’s the setup:
- Line up 7 glasses.
- Fill glasses 1, 3, 5, and 7 with water.
- Add red food coloring to glasses 1 and 7. Add yellow to glass 3. Add blue to glass 5.
- Leave glasses 2, 4, and 6 empty.
- Fold paper towels into strips and place them connecting the glasses (Glass 1 to 2, 2 to 3, 3 to 4, etc.).
The wait: The water “walks” up the paper towel and into the empty glasses, mixing the colors. You’ll end up with orange, green, and purple in the previously empty glasses.
Rhetorical question: Why does a paper towel soak up a spill? Same reason. Capillary action. It’s science you can see.
7. The Leak-Proof Bag
Polymer Magic
This is the experiment that makes kids gasp. You literally stab a pencil through a bag of water, and it doesn’t leak. Well, mostly it doesn’t leak. Use good pencils.
You need:
- A Ziploc bag
- Water
- Sharpened pencils
The trick: Fill the bag with water and seal it. Take a sharp pencil and quickly poke it all the way through the bag—in one side and out the other.
The science: The bag is made of a polymer. The polymer stretches and seals around the pencil, creating a temporary gasket. As long as the pencil stays in, the water stays in.
My experience: My son pulled the pencil out immediately to prove he could. The water went everywhere. He laughed. I cried. 10/10 would recommend.
8. Mentos and Soda Geyser
The Classic
You can’t have a mad science list without this one. It’s loud, it’s messy, and it’s the king of backyard science.
The Rules:
- Use Diet Coke. It’s less sticky than regular soda when you have to clean it off the siding of your house.
- Buy a pack of Mentos.
- Create a “dropper” by rolling paper into a tube so all the Mentos drop at once.
- Drop them in the bottle and RUN.
Why it erupts: The tiny pits on the Mentos candy provide a surface for the carbon dioxide bubbles to form rapidly. It creates a chain reaction so fast the soda shoots out like a volcano.
9. Homemade Rock Candy
Edible Crystals
This one tests patience. It takes about a week. But watching crystals grow day by day is fascinating. Plus, you get sugar at the end.
The method:
- Boil water and dissolve as much sugar as you can into it. You want a supersaturated solution.
- Pour it into a jar.
- Hang a string (weighted down with a paperclip) into the jar. Make sure the string doesn’t touch the sides.
- Wait.
The result: Sugar crystals form on the string. In a week, you have rock candy.
Rhetorical question: Ever wonder why honey crystallizes? Same concept. Too much sugar in the water.
10. The Invisible Ink
Spy Games
My kids spent an entire afternoon writing “secret messages” to each other after we did this. They felt like actual spies.
Two ways to do it:
- The Lemon Juice Method: Dip a cotton swab in lemon juice. Write on paper. Let it dry. To read it, hold it up to a light bulb (with adult supervision) or an iron. The heat oxidizes the juice and turns it brown.
- The Baking Soda Method: Write with baking soda and water. Reveal it by painting over it with grape juice concentrate. The acid in the grape juice reacts with the baking soda, changing the color.
Which is better? I prefer the baking soda method. No open flames, and the color change is immediate.
11. Dancing Corn
Solids, Liquids, and Gases
This one is weird. You watch popcorn kernels “dance” in a glass of water. It looks like they’re alive.
The recipe for chaos:
- Fill a glass with water.
- Add 2 tablespoons of baking soda and stir.
- Add a handful of popcorn kernels (they’ll sink).
- Slowly pour in vinegar.
The dance: The vinegar and baking soda create bubbles of carbon dioxide. The bubbles attach to the kernels and lift them to the surface. At the surface, the bubbles pop, and the kernels sink again. They’ll do this for minutes.
It’s hypnotic. Seriously. We stood there watching corn bob up and down for way longer than I’d like to admit.
12. Oobleck
The Non-Newtonian Monster
This is the messiest one. I’m warning you now. It gets in the carpet. It gets in the hair. It dries like cement. But the kids will beg for it.
The recipe:
- 2 cups cornstarch
- 1 cup water
- (Optional: food coloring)
Mix it with your hands. It feels solid when you squeeze it, but it drips like liquid when you open your hand.
The science: It’s a non-Newtonian fluid. It acts as a solid under pressure, but a liquid when left alone. You can even roll it into a ball quickly, but the second you stop rolling, it melts in your hand.
My advice: Do this outside. Or in the bathtub. Or in a plastic pool. Just keep it away from the drains. :/
Conclusion
There you have it. Twelve ways to occupy your kids that don’t involve a screen. Some are messy, some are tasty, and all of them are fun.
The best part isn’t the “wow” factor of the explosion or the color change. It’s watching their brains try to figure out why it happened. You’re basically a superhero who teaches physics and chemistry with pantry items.
So, which one are you trying first? Just remember my ceiling incident and aim the foam away from the curtains.
