Welcome the spooky season with bewitching Halloween Science Experiments for Kids. Sure to get everyone stupefied, these fun Halloween experiments pack elements of wonder and are super easy to do at home or in the classroom.
A perfect way to make your halloween party a big hit, these astounding science experiments for Halloween will leave kids and adults bewildered with excitement and joy.
Easy Halloween Experiments for Kids
1. Colour Changing Potion
Sure to make even the craftiest of witches and wizards jealous, this eerie colour changing potion is easy and quick to make. And that’s not all, the potion even bubbles and fizzes!
A complete package for the spooky season, our Colour Changing Potions is a must try Halloween experiment that will leave everyone spellbound!
2. Witch’s Crystal Ball
No list of awesome halloween science experiments cannot be complete without this spooktacular DIY crystal ball experiment.
Excite kids( or students!) with this cool science demonstration that will surely catch everyone’s attention. One of the most fun halloween science experiments for 3rd grade and above, it requires patience along with steady hands.
Quick Tip: Pair these ghastly science experiments with Kid-friendly Halloween Jokes.
3. Bubbling Cauldron
Bubbling cauldron is one of the most loved Halloween science experiments for kids of all time and a must for every season. It is easy to do and kids of all ages simply love this fun science experiment.
4. Color Changing Oobleck
This Halloween move over the classic oobleck and get spooky with our colour-changing Oobleck! Sure to get kids and adults excited, this color changing oobleck is so much fun to make and play with.
A great addition to your halloween science experiments for toddlers, preschoolers and elementary students, it offers a hands-on STEM lesson on states of matter and acids & bases.
5. Lava Lamp
Lava lamp is a much loved Halloween science experiment for preschoolers and young kids. The best part, even young children as old as 5 years and above can do this halloween experiment with little to no help.
Quick Tip: Make sure to include Free Halloween Toddler Printable Activities!
6. Wizard’s Brew
Kids will absolutely love making Wizard’s Brew. A great halloween science experiment for elementary students, this one gives a hands-on lesson in chemistry and exothermic chemical reaction.
7. Bubbling Blood
If you are looking for spooky Halloween science experiments for kids, this one’s for you! This kitchen science experiment is super easy to set-up. All you need is tomatoes and baking soda.
Simply blend the tomatoes into a purée and sieve it. Dilute the purée with white vinegar if it’s too thick. You want a consistency similar to blood. Pour the tomato purée into a flat dish and add baking soda to it.
The baking soda & acid will cause the blood like purée to bubble giving it the appearance of bubbling blood!
Related: Explore Fun Baking Soda Experiments for Kids of all ages!
8. Paper Towel Skittle Experiment
Make you of the excess halloween candy, in this case skittles, with this fun twist on the Skittle experiment.
This Halloween candy experiment clubs skittles rainbow activity with paper dying to make beautiful patterned paper. Take a few skittles in different colours and neatly place them in a kitchen paper towel.
Fold the paper towel neatly into a small square so that the candies are at different corners. Now using a pipette, add a few drops of water on the paper towel where the candies are placed.
Leave it for about 10 minutes and then gently unfold the paper to discover a beautifully patterned skittle coloured paper!
9. Nested Bubble Tower Wizarding Tournament
This is a super fun science challenge that will get everyone, from kids to adults, on board! Set up the mood by turning it into a fun Halloween game – we prefer to call it the ‘Wizarding Tournament’.
Everyone gets 3 minutes at max to make a nested bubble tower. The one who does it best – with most bubbles nested within each other within 3 minutes is hands-down the most powerful and craftiest wizard or witch!
For middle school and high-school kids, turn it into a minute-to-win Halloween STEM challenge.
While it is not the classic Halloween science experiment, we definitely recommend it as it requires skills no less than a wizard’s and just as much fun!
Quick Tip: Check out this DIY Bubble Solution recipe for best bubble towers!
10. DIY Water Volcano
Baffle kids with this Halloween STEM experiment that will conjure an underwater volcano that spits out blood! Perfect for the spooky season, this requires little prep and common supplies to make an eerie underwater volcano.
11. Screaming Penny!
Make a penny scream with this spooky science experiment for Halloween. All you need to do is press a penny onto the dry ice to hear it scream!
This mysterious screeching sound is produced by the penny as it is forced to vibrate by the escaping carbon dioxide from dry ice. Simple science but a lot of fun!
P.S: In case you are doing this Halloween stem activity with kids, make sure they do not touch dry ice with bare hands!
Related: Try these Fun Halloween Activities for Kids to keep them frightfully happy!
12. Grow & Shrink Gummy Bears
Put your magic skills to test with this fun science experiment that can blow-up as well as shrink gummy bears. This candy science experiment for kids studying osmosis and a great way to utilise some of the Halloween candy.
13. Rising Water Experiment
This is a fantastic way to amaze your little scientists on Halloween. A simple experiment, rising water is a great addition to baffling halloween experiments for preschool and elementary kids who are learning about air pressure.
Take a flat deep dish and add little water to it. Mix food colouring to the water. We chose red to fit it into the Halloween theme.
Place a tea light in the middle of the plate and light it up. To make the water rise, place a glass on the candle. In a few seconds the candle will extinguish and the water will magically rise up in the glass.
Strange, right? While we want you to believe in magic as we are into the Halloween season, there is really simple science behind this experiment.
The candle heats up the air above it in the glass, increasing the air pressure in the glass. Once the candle has consumed all the oxygen in the glass, it goes out. This reduces the heat, causing the air in the glass to cool and contract.
Thus, decreasing the air pressure within the glass in comparison to the air pressure outside it. This forces outside air into the glass along with the water till the point air pressure is the same inside and outside the glass.
14. Candy Density Experiment
A great addition to Halloween science experiments for elementary students learning about density, this one hits the nail in the most fun and easy way.
Take two candies – one with plain chocolate and the other with nuts like Snickers or Reese’s peanut buttercups. Cut equal sized potions from each and drop them a glass of water to see which one floats and which one sinks.
Clearly, snickers sinks down owing to its high density thanks to the peanuts it packs while the plain milk chocolate floats. The same holds true for milk chocolates and chocolates with wafers.
Try this fun halloween STEM activity with other Halloween candies as well. Make guesses as to which ones will sink and which will float before testing them.
Quick Tip: Make sure to indulge in Halloween Trivia this season!
15. Flying Ghosts
Flying ghosts are one of the classic and great halloween science experiments that have retained their charm over the years. A simple experiment for the Halloween theme, all it requires is a tea bag and a lighter.
Empty the contents of the tea bag by cutting the top of the tea bag. Lay it flat on a clean surface and draw a spooky ghost using a felt-tip pen.
Next, carefully blow through the tea bag to open it up and place it on a plate. Light the top of the tea-bag and watch your flying tea bag ghost soar away!
16. Jack-O-Lantern Volcano
An all time classic, Jack-O-Lantern volcano is a staple when it comes to easy halloween experiments for kids. All you need is dish soap mixed with vinegar and baking soda to make this fizzing, bubbling volcano.
In case you are looking for a spooky halloween twist to this experiment, replace baking soda-vinegar concoction with dry ice in warm water to make thick fog coming out of halloween pumpkin. This will make your Halloween night frightfully fun!
Related: Get your kids crafty with Easy Halloween Crafts.
17. Invisible Ink
Easy to make, this colour changing invisible ink experiment for Halloween will set the mood for the holiday. Sure to amaze everyone, this easy to make, no-heat required invisible ink is just perfect for kids of all ages.
18. Glowing Ice
This fun halloween science experiment for high school is a must try! Nothing can be more eerie than glowing blue ice.
All you need to do to make glowing ice is freeze tonic water in an ice-tray. Tonic water has quinine which glows in black light. Add them to your beverage to make your drink glow.
19. Make Electricity With Pumpkin
Halloween fun cannot get any better than this! With pumpkins all over, it is just the perfect time to make a Pumpkin battery to show off your wizarding (or science!) skills.
We assure this Halloween science experiment for middle school and high school will charge your students and kids.
