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
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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 ACTIVITIES
So many amazing Halloween science projects! Halloween and crazy science are a perfect fit for lots of fun and learning.
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!
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.
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.
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!
Kids love this combination of Lego, History and Science! And who doesn’t enjoy mummies at Halloween? Check out Gummy Mummies Science Experiment.
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.
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 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 FUN
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???
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!
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!
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.
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!
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!
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!
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.
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.
CANDY & EDIBLE HALLOWEEN SCIENCE
Halloween and candy go together perfectly, so why not use some of that candy to teach a little Halloween Science?
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.
Dive in deep with a unit study into the science of candy making. Kids love Candy Science because success in this lab is sweet!
Explore polymers and eat them too with this glow in the dark jello activity. Perfect for a Halloween party!
Pressed Sugar Science is a fun and easy activity that kids of all ages enjoy!
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.
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!
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.
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.
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.
This might not be a traditional engineering project, but creating these soaps is a must do as part of your Halloween plans!
HALLOWEEN CODING, CIRCUITS AND TECH ACTIVITIES
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!
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.
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.
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.
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.
SPOOKY HALLOWEEN SLIMES AND OOBLECKS
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!
Take your oobleck to a whole different level with this variation that makes a fantastic Halloween party game. Halloween Oobleck with Spiders.
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 STEM ACTIVITIES
Introduce your students to a fun Sudoku style challenge with these Halloween themed Math Puzzles. A fun Halloween Math learning activity.
Halloween Math Measuring Pumpkin Circumference – We don’t want to forget the M in STEM, so here’s an easy introduction to measurements using pumpkins.
Pumpkin Geoboard – Fun play with geoboards and pumpkins
Mummy Math Estimation – Mummy math fun!
Add some Art to your STEM and STEAM up Halloween
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.
Explore depth and perspective as we move from 2 dimensions to 3 dimensions with the spooky 3D art project for Halloween.
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.
FREE HALLOWEEN GAMES PRINTABLES
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.