Nothing goes together better than Halloween science and young kids! I can’t tell you how much I love the fun science activities that the Halloween season brings around. We particularly love Halloween science experiments! Join us as we count down with 31 Days of Halloween STEM. You are sure to find tons of ideas to make your Halloween amazing!


Nothing goes together better than Halloween science ideas and kids! I can't tell you how much I love the fun activities the Halloween season brings around here. We particularly love Halloween science! Join us for a Top 10 Halloween blog hop and stick around as we count down with 31 Days of Halloween STEM { NEW this year}. You are sure to find tons of ideas to make your Halloween amazing! AWESOME HALLOWEEN SCIENCE IDEAS FOR KIDS


This season we enjoyed more fizzy Halloween science experiments, but we have also tried out a few different slime ideas too! I am excited to say that we had a lot of fun with every activity.  

I also feel confident in saying that the Halloween science activities below are pretty much foolproof and easy to prep with common household ingredients!

Most of these activities will work at home as well as in the classroom with a couple of kids or a group of kids. Remember that you can tweak these Halloween ideas to fit your needs too.  Great for preschoolers to early elementary-aged kids!

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.


How to use this resource? Click on the images below to find out how to set up each Halloween science activity for your kids!

Don’t have time to try everything? We have picked out our top 10 Halloween science experiments below that are easy to do with young kids.

If you are looking for more awesome Halloween science ideas, make sure to check out our collection of Halloween slime recipes, Halloween science experiments and Halloween STEM activities.

Also, we have a list of Halloween preschool activities that kids are sure to enjoy!

Halloween Floam

Squishy, moldable Halloween Floam is the perfect sensory treat for kids this Halloween.

Witch’s Brew Fluffy Slime

Fluffy slime has such an amazing texture for little hands to play with. Find out how little Witch’s and wizards can get into the fluffy slime making fun this Halloween!

Witch Fluffy Halloween Slime Recipe Idea for Kids

Halloween Peeps Slime 

I don’t want to alarm you, but you might find eyes in your slime. Yes, I am talking about the eyes of Peeps! We tried something different around here and made a Peeps Candy Halloween slime.

Taste safe slime is great for kiddos who like to sample what they make!

Ghost Bubbles

Build bubbling ghosts with this simple ghost experiment ever scientist will enjoy!

Bubbling Brew Experiment

Mix up fizzy bubbly brew in a cauldron fit for any little wizard or witch this Halloween season. Simple household ingredient create a cool Halloween theme chemical reaction that is just as much fun to play with as it is to learn from!


Halloween Oobleck

Oobleck is a classic activity that is easy to turn into Halloween science with a few creepy crawly spiders and a favorite theme color!

Halloween Oobleck

Frozen Hands

Turn an ice melting science activity into a creepy fun Halloween Melting Ice Experiment this month! Super simple and super easy, this frozen hands activity is sure to be a big hit with kiddos of all ages!

Halloween Balloon Experiment

Preschoolers will love watching this fun Halloween science experiment. Blow up a ghostly Halloween balloon with a simple chemical reaction.

Rotting Pumpkin Jack

Pair a fun pumpkin book with a simple rotting pumpkin experiment for all things Halloween science.

Dissolving Candy Corn

This dissolving candy corn experiment is a neat Halloween science experiment that is easy to set up with only a few supplies needed!


When I pick out other Halloween science ideas to share, I want you to know that I put a great deal of thought into what I think would be the most fun and learning for my son! These are all ideas I would love to try with him one day.

I even included a sensory bottle for babies as a first science play idea! These are some of my favorite Halloween science/sensory play and learn ideas from women I truly admire.

Halloween Salt and Ice Experiment | Happy Hooligans

Candy Corn Slime | Craftulate

Dissolving Pumpkin Science | Lemon Lime Adventures

Bubble Spider Webs | Preschool Powol Packets

Halloween Sensory Bottle (science for babies!)

We hope you have a spooky good time and learn a little something new too!


Click below to see even more Halloween activities that are perfect for kindergarten, preschool, and elementary!


  1. Fun! My boys would love those slime projects. I’ll have to see if I can muster enough courage to try one. . .

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