I've added some new Halloween science experiments to our collection this year, so I thought I'd put them together in one big roundup with lots of great ideas from other bloggers too. Here at Science Sparks, we love Making science spooky! We've got fizzy witch potions, creepy chia seed slime, a spooky noisemaker, a pumpkin optical illusion, spiders hiding in fizzy rocks, and so many more spooky ideas.
If you try any of my Halloween science experimentsDon't forget to share a photo!
Halloween science experiments
Potions and slime
Set up a witch's lab and try out one of our spooky witches potionsWe have potions that change color, that bubble, and potions that look and feel disgusting.
I set up this activity with food coloring, water, vinegar, and baking soda and let the kids create their own concoctions.
Try to make some Witches' bubbly drinks while we investigate which are the best bubbles. These are also great for a Halloween party.
We love the look of this. Glow in the dark slime of left brain crafts. This would be a great activity along with my Glow in the dark oobleck!
Stretch and squash our Halloween slimeIt would be great to give this in small jars to trick-or-treating kids as an alternative to candy.
Experiments with spiders and insects
Make some creepy frozen hands and time how long it takes for them to melt (thanks to Happy hooligans For the idea) Can you speed up the melting? Try adding salt or warm water and see what happens.
How about a little? dancing worms Like plasticine for Plato?
If you're feeling creative, these robots drawing spiders They are great for learning about circuits and motors. You will need a small motor, wires and a battery, but they can be reused for many different science activities, so they are well worth the investment.
Our Spider paper plate marble run And the magnetic maze is a cute Halloween craft that doubles as a science project!
TO Spider Candy Stick Catapult It's a great way to trick or treat friends and family this Halloween!
Have fun with something bubbly Effervescent rocks Made with baking soda and hidden bugs inside, it's perfect for kids who love baking soda rashes.
Experiments with pumpkins
These pumpkin lava lamps These are a great alternative to carving a pumpkin. The best part is that you can use them over and over again! Just add a fizzy vitamin tablet or Alka Seltzer when you want them to pop. You can even save the empty jar for next year!
Do erupting pumpkins like these of Growing a Jeweled Rose.
Inspiration Labs It has some great stuff pumpkin oobleck This is perfect for kids who like a messy activity.
Coffee cups and crayons It has some bright things pumpkin pie doughwhich is great for sensory fun or learning about forces.
Learn about chemical reactions through Exploding a pumpkin balloon without touching it!
Or how about making a? Pumpkin with drip art as The tree of imaginationIt would be great to use this as viscosity research.
How about a Guess what's in the pumpkin Game? These cute pumpkins hide slimy spaghetti, sticky slime, and other disgusting substances.
Make a face appear on a pumpkin with this funny optical illusionOptical illusions are fantastic science activities because they are inexpensive and very easy to do.
We have some great ideas for you to learn while… carve a pumpkin.
Art by Ted Red Has some cute lanterns. These would be ideal for scientific research covered with different types of paper to investigate which lets in the most light.
Experiments with ghosts
Try one Dancing ghost like the Inspiration Labs or the jumping ghosts. Learn about static electricity.
Our magnetic ghost It's a super creepy way to learn about magnetism.
Terrifying experiments
Scare your friends with something creepy writing on the mirror and a Super Spooky Noise MakerTry experimenting with different types of cups and tapes to investigate how the noise changes.
Add some extra realism to a Halloween costume with some false blood!
More spooky science experiments for Halloween
Keep the whole family entertained with a Spooky Science Quiz.
Make a model of a brain with plasticine.
Create a Halloween House And add some light! As an additional activity, you can make an entire street and add switches to turn the lights on and off.
Design and build a plant monster!
How about a spooky volcano? We used this fantastic one Volcano Learning Resources and I scared him with some fake cobwebs.
We had a lot of fun with this. Chia seed slime (Thanks to Fun at Home with Kids for the idea.) The consistency is perfect and it's not toxic at all. We made it with chia seeds soaked in cornstarch and a little bit of water.
Once all the Halloween fun is over, why not try some of these? Easy ideas to use up leftover pumpkins?
Raw science
My new book, RAW SCIENCEIt's perfect for this spooky time of year! Make fake blood, red blood cell cupcakes, fake poop, bendy bones, and many more delicious and scary things for kids!
Happy Halloween
Last updated on October 31, 2023 by Emma Vanstone
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