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Kids love theme science activities and it gets them learning, and loving it! These Halloween science experiments and activities below work for kids ages pre-k through early elementary and above. Get started exploring chemistry and physics with easy to set up and inexpensive science activities this Halloween.
Shadow puppets are another very easy activity and can be made fun for older children by adding coloured cellophane for extra effect. If you have some dry ice from the Ghost Bubble Sphere left over, you might want to try this fun little demonstration. As it sublimates, the carbon dioxide gas escapes around the quarter causing the quarter to vibrate and make a rather spooky shrill along with occasional humorous sounds. Always wear gloves when performing this demonstration. All your neighbors will have Jack-O-Lanterns that glow orange, but you will impress them with a Jack-O-Lantern that glows green! Best of all, the green glow is simple and safer than traditional candles.
Frozen Hands
Then, add those to your tray for a classic baking soda and vinegar experiment that comes pouring out of the eyes and mouths of your paper cup pumpkins. Here you’ll find our collection of Halloween math activities for kids. Ice excavations are easy and inexpensive to set up. I used to be a chemist, but now I spend my days doing science experiments with my three kiddos. Coffee Cups and Crayons has some brilliant pumpkin pie play dough, great for sensory fun, or learning about forces.
As you’ve probably guessed, these Halloween activities are not meant to scare or frighten your kids. Rather, they should be fun and educational for all involved! Here are some of our favorite Halloween-themed science and engineering experiments and activities to do with students at school or kids at home. For this pumpkin science experiment, it’s best to have a trained professional set up and run this lab.
Brain Surgery Stem Experiment
Make fizzy potions with fruit juice inspired by Room on the Broom by Julia Donaldson. I often find that some of the students’ favorite activities in preschool revolve around science and the senses. And since your students will be participating in so many of the science and sensory activities listed above, you’ll need to keep lots of quality supplies on-hand. Color Mixing Experiment Kit for KidsArt and science come together in the Steve Spangler Color Mixing Kit.
Use your leftover Halloween candy to do over 25 candy math and science activities. Halloween is the perfect time for oozing, bubbling and eye-catching science. If you love to perform science demonstrations, Halloween is a wonderful excuse to fill that cooler with dry ice and get ready for a fun-filled day filled with “ooze” and ahhhs! Check out our dry ice demonstrations and instructions to create a spook-tacular Halloween. Brew up a fun potion with this witch’s brew experiment.
Slime
Squishy, moldableHalloween Floam is the perfect sensory treat for kids this Halloween. Make everyday fun with 31 Days of Halloween STEAM Challenges! To get a set of these free printable activity prompts, simply fill out the form below. Learn about the brain and have some spooky fun with5 Messy Ways to Play Brain Surgeonfrom Left Brain Craft Brain.
Make Halloween moon dough and turn it into a fizzing ghost experiment with a bit of vinegar to get things bubbling. The kids will shape their moon dough into ghosts that will then fizzle away when the eruption begins. Here’s another variation on fizzing pumpkins, this time using pumpkins made out of baking soda. You’ll need a silicone mold to make them, but that will come in handy for making other Halloween goodies, too.
We’ve added a few new Halloween Science Experiments to our collection this year, so I thought I’d put them in one big round up with lots of great ideas from other bloggers too. Here at Science Sparks we love making science spooky! We’ve got fizzy witchy potions, creepy chia seed slime, a spooky noise maker, pumpkin optical illusion, spiders hidden in fizzy rocks and lots more creepy ideas.

Halloween Peeps Candy Ghost Experiment- Your children at school and at home with have fun exploring what happens when Peep ghosts send the night in various liquids. This STEM activity has free printable that goes with it. They’re the perfect addition to all of your Halloween activities for preschoolers.
Turn off the lights and watch our Atomic Slime and Atomic Slime glowing worms glow. Or, write your very own hidden messages and make scary Halloween sounds. Halloween is the perfect time to play around with fun science experiments like making slime and exploding pumpkins. 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, there are tons of spooky science experiments to try.
Be sure to check out my Halloween Pinterest board for even more ideas. You’ll receive all the supplies needed to make 24 shaker cups filled with Vampire Slime. It’s the most original take-home party favor you’ve ever seen. You’ll also learn how to make color-changing vampire veins that are guaranteed to make your guests scream with delight. Finally, you’ll learn how to capture a spooky, glowing image on a piece of phosphorescent paper using a battery-powered black light wand. Learn how to make homemade slime, explore how ice melts, blow bubbles, try fizzy eruptions all using ingredients or supplies found in your kitchen or pantry.
Purchase one or two large glowing light-sticks per pumpkin at a party store or hardware store. Place your pumpkin outside on Halloween night and admire the “Oooos” and “Ahhhhs” of Trick-Or-Treaters. Once all the Halloween fun is over why try some of these easy ideas to help use up spare pumpkins. Use pumpkin erasers for a fun Halloween themed STEM stacking challenge. Check out the list below for some items perfect for a spooky good time exploring science and the senses. I’m going to stop there and get down to the awesome Halloween sensory and science activities.
Have you ever tried the rubber egg experiment? That’s what this is, but in keeping with the holiday theme by making it a monster eyes version. Make black and orange “rubber” eggs that look like monster eyes while learning all about the science of osmosis.
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 our simple science experimentsat home or in the classroom. Release your mad scientist this fall season and enjoy one of these awesome Halloween science experiments. Our Vanishing Ghost Poop is just one of three haunting Halloween activities for kids in our Ghost Science Kit. Other Halloween science activities include Disappearing Ghost Eggs and Atomic Glow, all of which can provide hours of fun at your next Halloween bash! Try out the Ghost Science Kit from Steve Spangler Science, and be amazed at how much fun your kids will have learning about superabsorbent polymers and glowing dye.

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