Halloween + science = AWESOME Halloween science experiments and STEM projects! Easy Halloween experiments using simple supplies make for creative STEM projects for all ages. When you aren’t out pumpkin picking and cider donut eating this fall, try out a couple Halloween science activities. Make sure to join us for 31 Days of Halloween STEM Countdown.
HALLOWEEN SCIENCE EXPERIMENTS AND STEM IDEAS
Any holiday is a perfect opportunity for creating simple but AMAZING theme science activities. We think Halloween tops the chart for cool ways to explore science and STEM all month long. From gelatin hearts, to wizards brew, erupting pumpkins, and oozing slime…
- Kids love theme science and it gets them learning and loving it! You can easy explore similar topics all year with different themes!
- Theme science and can still work with your NGSS (Necxt generation Science Standards)
- Our Halloween science activities work for kids ages pre-k through early elementary
- Explore chemistry and physics with easy to set up and inexpensive science activities
Make sure to grab our printable Halloween STEM challenge calendar below and join along with the fun as we count down the 31 days to Halloween (click here)!
WHY IS SCIENCE SO IMPORTANT?
Kids are curious and always looking to explore, discover, check out, and experiment to find out why things do what they do, move like they move, or change like they change! Indoors or outdoors, science is definitely amazing! Holidays or special occasions just make science all the more fun to try!
Science surrounds us, inside and out. Kids love checking things out with magnifying glasses, creating chemical reactions with kitchen ingredients, and of course exploring stored energy! Check out 100+ genius STEM projects to get started any time of the year including the other “big” days.
Science starts early, and you can be a part of that with setting up science at home with everyday materials. Or you can bring easy science to a group of kids! We find a ton of value in cheap science activities and experiments. Make sure to check out our Halloween inspired tinker tray.
AMAZING HALLOWEEN SCIENCE EXPERIMENTS
Each year we add to our growing collection of Halloween science experiments and STEM activities. This year is no exception and we have a fun line up to share. Of course you can always find plenty of Halloween slimes to get you started. Slime is AMAZING chemistry.
We also love to explore physics and chemistry through reactions, forces, states of matter, and more good science-y stuff. In fact, you don’t have to be a rocket scientist to enjoy the simple science experiments at home or in the classroom.
Holiday science like these Halloween experiments should be fun and stress free for everyone! Click on the ORANGE links below to read more about each Halloween science or STEM activity.
Here are the latest from the video above!
Oobleck is a classic science activity that can be themed for a number of holidays or seasons! Of course it’s easy to turn into a Halloween science experiment with a few creepy crawly spiders and a favorite theme color!
You will need cornstarch, water, and food coloring. You want to start with a ratio of 2:1, cornstarch to water. I would start by adding food coloring to the water and then add more to the mixture of necessary.
TIP: If it’s too soupy, add cornstarch. If it’s too hard and dry, add water. Only add in small increments till you get the desired consistency.
Oobleck is a Non-newtonian fluid which means it is neither a liquid nor a solid. You should be able to pick up a chunk of oobleck and form it into a ball before it turns back to liquid and drops back down to the bowl.
HALLOWEEN FIZZING CAULDRON
Another classic science experiment gets a holiday theme twist. Baking soda and vinegar chemical reactions are always a favorite of kids! Who wouldn’t love all the bubbling and fizzing fun. What happens when you mix an acid and base? You get a gas called carbon dioxide!
You will need a cauldron (or bowl), baking soda, white vinegar, food coloring, dish soap, and eye balls!
Add a heaping amount of baking soda to your bowl or cauldron. Place on a tray, in the sink, or outside because this can get messy. Add a squirt of dish soap and food coloring as desired. You can also mix food coloring into the vinegar. Go ahead and pour in white vinegar and watch the bubbling brew start up!
HALLOWEEN LAVA LAMP AND DENSITY EXPERIMENT
This classic science activity is a hit all year round but we can make it a bit creepy for Halloween by changing up colors and accessories. Explore the density of liquids and add in a cool chemical reaction too.
You will need a jar or beaker, cooking oil, water, food coloring, and alka seltzer tablets or generic equivalent.
Fill jar a 1/4 of the way with water. Now go ahead and add the cooking oil. Check out what happens! Did you know that oil and water don’t mix because they don’t have the same density. You can check out a combination of liquids if you try out our spooky density column below!
Alternatively, you can use baby oil (but it’s more expensive).
Observe what happens when you add drops of food coloring.
Now go ahead and add a tablet. Check out the cool lava lamp like show. You can repeat as desired with another tablet.
Watch out this can also get messy especially if the kids sneak in extra tablets. You can read more about the science here.
HALLOWEEN SLIME COLLECTION
Our Halloween slime has everything you need for making the BEST Halloween slime recipes including fluffy slime, erupting potions slime, pumpkin guts slime, and even taste safe or borax free slimes. The possibilities are endless once we show you how to master slime making.
And yes slime making even fits into the NGSS standards for grade 2, states of matter!
WIZARD’S (OR WITCH’S) BREW EXOTHERMIC REACTION
An exothermic reaction may sound scary but it’s really simply and a whole lot of foamy fun. A few simple ingredients from the grocery store and you’re exploring some great chemistry for Halloween.
GELATIN HEART HALLOWEEN SCIENCE
Gelatin isn’t just for dessert! It’s for Halloween science too with a creepy gelatin heart experiment that will have your kids squealing with grossness and delight.
FRANKENSTEIN’S FROZEN BRAIN MELT
Wouldn’t Dr. Frankenstein be proud of your Halloween frozen brain melt science activity exploring the properties of water. Is it a liquid or a solid?
Newton has nothing on our DIY homemade popsicle stick catapult for Halloween! Explore the laws of motion while flinging eyeballs around the room.
ERUPTING JACK O LANTERN HALLOWEEN CHEMISTRY
This is going to get a bit messy, but it’s super cool. An erupting Jack O Lantern is a must try at least once!
SPOOKY LIQUID DENSITY HALLOWEEN PHYSICS
Explore the density of liquids with an easy to set up spooky Halloween liquid density science experiment with items around the house.
PUMPKIN GEO BOARD HALLOWEEN STEM
A twist on the classic geo board activity when you use a pumpkin instead of a board. A halloween geo board is offers some great skills practice too.
GHOSTLY STRUCTURES FOR HALLOWEEN ENGINEERING
A Halloween twist on a classic structure engineering activity. Challenge your kids to build the tallest ghost with this Halloween STEM challenge! We grabbed materials from the dollar store!
SIMPLE LEGO HALLOWEEN BUILDING IDEAS
Build with LEGO and make some cool Halloween LEGO decorations.
FIZZY GHOSTS BAKING SODA SCIENCE
Kids love anything that fizzes, so our fizzy ghost for Halloween baking soda science are perfect for little hands!
3 EASY HALLOWEEN CANDY STEM ACTIVITIES
Iconic Halloween candy mixed with simple STEM activities for a cool Halloween STEM experience you can set up quickly.
LEFTOVER HALLOWEEN CANDY STEM
We all know what happens Halloween night… Our kids get a ton of candy that often goes un-eaten or we would wish it would go un-eaten. Instead of arguing with the kids over how much candy to eat, encourage Halloween candy science instead.
GHOSTLY BUBBLES HALLOWEEN SCIENCE
Build bubbling ghosts with simple bubble science ever scientist will enjoy!
Non-newtonian fluid is cool to explore and only 2 basic kitchen ingredients.
Ice melt science is a classic experiment. Add a spooky spidery theme.
WHICH HALLOWEEN SCIENCE EXPERIMENT WILL YOU TRY!
Click here to join the 31 Day Halloween Countdown and grab your Halloween challenge calendar to keep handy.