31 Days of Halloween STEM Activities and Projects
Halloween STEM Activities to celebrate a 31 day countdown. Includes Halloween Science, Technology, Engineering and Math, plus FREE printables, Halloween Art and Halloween Sensory activities! Updated with even more exciting Halloween Activities for 2021!
Halloween is the perfect time for some fun and engaging STEM activities. There are just so many activities that capture a child’s interest and imagination during this season, and so many of them are perfect for our young scientists! We love Halloween around here and to celebrate I’m planning 31 days of Halloween STEM Activities countdown to Halloween. Whether you are at home or celebrating in the classroom, we have activities for all ages. Join us on our month long Halloween STEM adventure!
HALLOWEEN STEM ACTIVITIES
Disclaimer: This article may contain commission or affiliate links. As an Amazon Associate I earn from qualifying purchases.
Not seeing our videos? Turn off any adblockers to ensure our video feed can be seen. Or visit our YouTube channel to see if the video has been uploaded there. We are slowly uploading our archives. Thanks!
I’ve gathered up over 31 science, tech, engineering and math activities that are going to make the countdown to Halloween amazing for your children! Most of these activities are meant for elementary aged children, however I have also included activities for younger kids, plus teens and even adults. Enjoy these spectacularly spooky STEM Halloween projects!
Halloween Science Experiments
So many amazing Halloween science projects! Halloween and crazy science are a perfect fit for lots of fun and learning.
Flying Ghosts Tea Bag Experiment
This is a fun WOW worthy experiment that will excite your little scientists. Especially once their ghosts take flight! Take a moment and explore the thrilling science of Flying Tea Bag Ghosts!
Magnetic Flying Ghosts
This is another fun flying ghosts experiment that uses the power of magnetism and a little engineering, to make ghosts fly like magic! This is a fun twist on our Wingardium Leviosa experiment for Halloween.
Spooky Spider Magnetic Science
This project is an amazing STEM project for Halloween! It involves some engineering, math and geometry, and it is powered by the thrilling science of magnets! With this Spooky Spider Magnet Science Project kids will build a special spider web with a spider that dances, jigs and wiggles its way around the web. So cool!
Halloween Skittles Experiment
Got lots of candy, no problem! Put it to great use with this Skittles Experiment. Make spooky designs, then watch the fascinating science unfold in this Halloween Skittles Experiment.
Halloween Balloon Races
This physics challenge is a spooky fun blast! So simple to set up, kids explore Newton’s Laws of Motion as they have fun racing their Balloon creations. A fantastic project to do in the classroom, homeschool or at a Halloween Party. Check out Halloween Balloon Races.
Halloween Marshmallow Science
This quick and fun science experiment let’s kids also explore their artistic side before learning about the expanding energy of heat! From toddlers to teens, this Halloween Marshmallow Science is so much fun!
Gummy Mummies
Kids love this combination of Lego, History and Science! And who doesn’t enjoy mummies at Halloween? Check out Gummy Mummies Science Experiment.
Glow in the Dark Science
Halloween is the perfect time to add some glow to your science experiments and projects! Here we’ve gathered up our favourite Glow in the Dark activities, and included the science behind the glow for your lessons and learning.
Halloween Magic Milk
Inspired by a much beloved science experiment, magic milk, we set out to mix our own Halloween colours by applying the colour wheel, then explored the magical science of Magic Milk with a Halloween twist.
Grow Scented Halloween Crystals
Grow Your Own Scented Halloween Crystals. These decorations are extremely durable and fun to make. Exactly what we need to decorate for the big day.
Halloween Chemistry Experiments
Halloween Moon Dough – Fizzing Ghosts!
We LOVE moon dough! It is such an incredible sensory experience and so much fun to play with. In this spooky activity we bring in some chemistry to create a really cool fizzing ghost science experiment for Halloween. I mean really, how cute is this science???
Halloween Balloon Experiment
This is a fun activity that involves a surprise! Kids can make balloons, ghosts, or anything they can imagine. Then set off the chemical reaction to reveal their spooky designs. This Halloween Balloon Chemistry Experiment is so much fun!
Monster Eyes – A Halloween Egg in Vinegar Experiment
Have you ever made a rubber egg? This classic chemistry project is so fun, especially with our Halloween twist where we turned them into squishy, bouncy, rubbery Monster Eyeballs!
Hand Painted Pumpkin Bath Bombs
These bath bombs are the ultimate blend of chemistry, math and art! Make sure you get all your ingredient ratios perfect, so you can set off be best fizzy reaction, but before you do, paint your pumpkin with a special face! Halloween STEAM at it’s best! Check out this DIY Pumpkin Bath Bomb Recipe.
Glow in the Dark Bath Bomb With Spooky Surprise
Explore some fantastic chemistry (acid-base reactions and how things glow) while making bath bombs kids will have a blast using! Just watch out for the creepy surprise!
Monster Eye Bath Bombs
This Halloween Bath Bomb activity provides a little art with your chemistry as kids use soap to paint their bath bombs for a spooky, shudder worthy, bath bomb activity.
Halloween Fizzing Pumpkin Treasure (A perfect Halloween twist on Dino Eggs!) – Every time we do the Dino Eggs activity it is a HUGE hit with all ages, so when I saw this idea I knew it was the perfect addition to our Halloween STEM Activities Countdown!
Puking Pumpkins – Volcano Pumpkin Science Experiment
This chemistry experiment is always a HUGE hit with the kids. Carve your pumpkin then use a little chemistry to turn it into an erupting volcano pumpkin. As my son proudly declared: It’s a puking pumpkin!
Make A Glow In The Dark Lava Lamp
These are so much fun, my kids love it every time we do this activity. Glow in the Dark Lava Lamps are the perfect way to take the traditional lava lamp science experiment and give it a Halloween twist.
Halloween Glow Milk Plastic Activity
Make plastic figures at home with a spooky theme that actually glow in the dark! Making plastic from milk (casein) is a fantastic chemistry experiment for kids. With this twist creating Glow in the Dark Plastic Halloween Trinkets, kids will have a blast with their science lessons.
Halloween Engineering Projects
Candy Catapult
This Halloween STEM activity is an absolute BLAST! Engineer your own catapult then launch candies into pumpkins and cauldrons. Kids will learn engineering, physics and math, all while having fun! Makes a great party game or classroom project. Candy Catapult is a great Halloween game. For a different challenge, check out this pumpkin catapult made out of Lego by our friends!
Candy Engineering and Math Challenge
This Candy Construction STEM project is tasty fun! Learn math, physics and engineering skills, while also building critical thinking, problem solving and fine motor skills. All in one tasty, fun activity that has kids trying to hit the target with candy.
Build a Skeleton Hand
In this Biology STEM Activity we are building a model of the hand that is very Skeleton like! Kids can make theirs out of black construction paper and use white or glow in the dark markers/paint to decorate their spooky, moving hands. Building Skeleton Hands is a fantastic STEM challenge for Halloween.
Halloween Spinning Pop Up Card
In this STEM project, kids use our free printable templates to create a Halloween card that pops up and spins. They get to pick from two different spinning designs. These Halloween STEM Cards are brilliant for Halloween party invitations.
Creepy Crawly Spider Soap Making Project
This might not be a traditional engineering project, but creating these soaps is a must do as part of your Halloween plans!
Halloween Coding and Circuit Projects
Halloween Mummy Circuit Craft
We took a simple Halloween Craft and powered it up with a simple circuit project that will thrill and excite your students! Check out this Halloween Mummy Circuit Craft for your Halloween STEM project plans.
Halloween Bat STEM Craft
A fun bat twist on our Mummy Circuit craft is this Halloween Bat Toilet Roll Craft with glowing red eyes. This simple circuit project is fun and spooky. Perfect for Halloween!
Build a Fruit Battery out of Pumpkins!
Learn about battery cells, currents, voltage and more as you build a battery out of pumpkins and squash. Do it right and you can light an LED! Build a Pumpkin Battery this Halloween and wow your students!
Halloween Coding Activity
Kids love this screen free printable coding activity for Halloween. A fantastic way to introduce students to sequencing, while applying their critical thinking, problem solving and attention to detail skills. Free printable included for STEAM Powered Family mailing list members. This Halloween Coding Activity is perfect for the classroom or homeschool.
Glow Salt Circuits
Perfect for STEMists from elementary to high school, these salt circuits are so easy to make but have big wow factor when you turn off the lights! Glow Salt Circuits are a must do with your students this Halloween.
Build a Witch or Wizard Circuit Wand
Planning on heading out as a witch or wizard this year? Make your very own Circuit Wand that lights up at your command! (Or by closing the circuit)
Wizards Coding Printable
Screen Free Wizards Coding Challenge- a fun, educational, free and spooktacular coding Halloween. Try your hand at some fun screen free coding challenges with this Magical Wizards Coding Fun Pack.
Pumpkin Squishy Circuits
This is a tried and true project that is so much fun! The play dough does dry out though, so don’t make the play dough for the Pumpkin squishy circuits too far in advance of your lessons.
Candy and Edible Halloween Science
Halloween and candy go together perfectly, so why not use some of that candy to teach a little Halloween Science?
Halloween Candy Bomblicious Recipe
These sweet treats are the perfect recipe for Halloween to make with the kids. The best part is smashing them open to find the surprises inside. A great project for a Halloween party! DIY Halloween Candy Bombs.
Candy Science
Dive in deep with a unit study into the science of candy making. Kids love Candy Science because success in this lab is sweet!
Glow in the Dark Jello Recipe
Explore polymers and eat them too with this glow in the dark jello activity. Perfect for a Halloween party!
Halloween Pressed Sugar Treats
Pressed Sugar Science is a fun and easy activity that kids of all ages enjoy!
Layered Lollipops
A beautiful layered density experiment with candy that smells and looks amazing! If you have lots of lollipops or hard candies hanging around this Halloween, this is a great way to use them to explore scientific principles.
Halloween Slime and Oobleck
Glow In The Dark Oobleck
Slime and oobleck are perfect for Halloween and I have lots of it planned over our 31 days. To kick things off we are going to play with some glow in the dark oobleck that glows with or without black light!
Halloween Oobleck Spider Search Game
Take your oobleck to a whole different level with this variation that makes a fantastic Halloween party game. Halloween Oobleck with Spiders.
Glow in the Dark Slime
We LOVED making this slime and it turned out perfect! Excellent for a Halloween party and the paint creates the fluffiest texture in the Glow in the Dark Slime.
Halloween Math Activities
Halloween Math Logic Puzzles
Introduce your students to a fun Sudoku style challenge with these Halloween themed Math Puzzles. A fun Halloween Math learning activity.
Halloween STEAM and Art Projects
Halloween Thaumatropes
Thaumatropes are a traditional optical illusion toy. With this project we are creating Halloween themed Thaumatropes to trick the eye, which is always a treat! Printable available.
Halloween Agamograph STEAM Project
This optical illusion project is a fantastic classroom STEAM project for October. The results look incredible displayed around the classroom and school and will demonstrate optical illusions and perspective to all students. This Halloween Agamograph is a fantastic Halloween Art conversation piece!
Halloween Art and Math Challenge
Combine a little art with lot of math as you complete these Halloween Line Art projects. We’ve also included some bonus writing prompt crafts making this the perfect project for a classroom.
3D Halloween Art Project
Explore depth and perspective as we move from 2 dimensions to 3 dimensions with the spooky 3D art project for Halloween.
Halloween Pomander Project
In this heritage activity, kids create the most amazing smelling, and adorable pomanders. It builds fine motor skills, promotes creativity and is an incredible sensory experience (you NEED to smell these!!!). Make them with oranges or mini pumpkins for Halloween.
Halloween Printables
Spooky Halloween Tetris Printable
Spooky Tetris is a fun printable version of the game that has been shown to have significant cognitive benefits and may even help with healing from trauma. Check out this fun printable version for your kids.
Join the STEAM Powered Family and get a FREE Halloween themed Maze and Word Search. Designed with a little extra challenge for your older kids.
Don’t miss out on our Bats and Cats Activity Pack!
Grab the Printable Pack Inspired by This Popular Resource in our Shop
Includes a calendar with 31 Days of Halloween Activities, task cards, challenges, games and more.
