One of my favorite times of the year is the Halloween season. It’s a chance for me to act like a kid again and dress up in silly costumes.
But our favorite thing to do during October are Halloween STEM activities for middle school! These middle school Halloween STEM challenges are a fun way to mix science with spook.

We’ve always done tons of middle school STEM activities and kids science projects, but this year, I decided to give our science experiments and STEM activities a little “ick” factor by transforming them into Halloween STEM activities.
Yet another thing I love about Halloween is the ability to gross out my kids. Middle schoolers especially love a good gross out!
Middle schoolers will be grossed out in the best way possible when you show them these Halloween STEM activities and Halloween science experiments. STEM education has never been so fun!
If you love Halloween and you love STEM activities, jump right in with these amazing Halloween STEM activity ideas for middle school!
And you’ll also like our list of Halloween science experiments.
Why Do Middle School Halloween STEM Activities?

The ultimate goal of hands-on STEM activities at the middle school level (and even at the high school level) is to help children gain an interest in STEM fields.
STEM fields are jobs that use elements of science, technology, engineering, and math and range from careers like teaching to becoming a doctor, or even becoming an astronaut.
Today, almost every career includes some STEM, which is why these subjects are so important for kids to learn early and have an interest in.
STEM subjects in school also aren’t just there to teach STEM subjects to kids, but also work with the philosophy that school “subjects” work together in harmony, and you can’t really use one subject alone, but must look at problems from a lens of creativity and combination solutions.
During Halloween, the theme of “gross” or “mad scientist” becomes popular in culture.
That makes this the ideal time to introduce some fun hands-on science themes to middle schoolers.

WHAT YOU NEED TO DO THESE HALLOWEEN STEAM ACTIVITIES
EZ BioResearch Bacteria Science Kit (IV): Top Science Fair Project Kit. Prepoured LB-Agar Plates And Cotton Swabs. Exclusive Free Science Fair Project E-Book Packed With Award Winning Experiments.Corning Pyrex #4980 Erlenmeyer Narrow Mouth, Glass Flask Set – 5 Sizes – 50mL, 125mL, 250mL, 300mL, 500mL
Superlady 18pcs 20x150mm 36ml glass test tube with Wooden stopper for scientific experiments, party, decorate the house, candy storage
Pyramex S4110SMP Intruder Safety Glasses (12 Pack), Clear Lens with Assorted Temple Colors
Delta Education Metal Tweezer, 4
Be Amazing Toys Big Bag Of Science +70 Activities
HALLOWEEN SCIENCE BOOKS TO USE
Grossology: The Science of Really Gross ThingsOh, Ick!: 114 Science Experiments Guaranteed to Gross You Out!
Bugs: A Stunning Pop-up Look at Insects, Spiders, and Other Creepy-Crawlies
The Mason Jar Scientist: 30 Jarring STEAM-Based Projects
My middle schoolers love these Halloween STEM activities, and most of these middle school Halloween STEM challenges can be adapted for classroom or home use.
Creepy Halloween STEM Challenges for Middle School
There are dozens of Halloween STEM activity ideas to try.
Some of these are completely new STEM Halloween STEM activities and some are simply Halloween twists on classic STEM activities.

Middle School Halloween Science Experiments
Halloween science experiments are the most popular this year. However, as discussed above, nothing in science is really *just* science.
We also use technology, math, and engineering or design to complete science experiments.
But, if you’re looking for Halloween science experiments that focus mostly on the science portion, you’ll like these STEAM Halloween activities.
And if you need even more Halloween science, check out our full list of Halloween science experiments.
Try the Ghost Chromatography Science Experiment and learn how chemists prove what a material is!
Make a Halloween Density Jar and explore the basics of density vs mass.
Explore the importance of hand washing and bacterial growth with the Hand Washing Science Experiment.
Middle schoolers will love learning about non-Newtonial fluids with this Spooky Spider Silk Slime Experiment.
Explore chemical reactions by making a Bubbling Spider Leg Potion.
Make Witch-Inspired Salt Crystals and learn about ionic bonding and crystal formation.
READY TO GO HALLOWEEN SCIENCE KITS
Playz Disgusting n’ Gross Zombie Farts, Boogers, & Bloody Slime Science Activity & Experiment Set – 34+ Tools to Make Levitating Eyeballs, Gizzards, Fart Putty & Boiled Boogers for Boys & Girls Age 8+Scientific Explorer Disgusting Anatomy Brain
Halloween Idea – ZOMBIE PLANT GROW KIT- (Touch It and It PLAYS DEAD!) Unique Nature Kit- Grow a Fun Interactive House Plant that Plays DEAD when Touched & Comes back to life in Minutes!
Ghost Science Kit
Halloween Science Party

Halloween Technology Activities for Middle School
Nothing says “scary” like technology! Middle school kids will have a blast with these technology-related Halloween experiments.

Design a Halloween Catapult and explore angles, tragectories, and other fun math concepts!
Make Exploding Minecraft Creepers and explore the basics of rocket science.
Learn about water pressure and diving science in the Diving Ghost Experiment.
Middle School Engineering Halloween Experiments
Voodoo Leakproof Bag Experiment
Make your own Halloween Jello Worms and explore the design behind common props and horror elements in gross movies.
Try “Brain Surgery” and learn about molecular bonding and polymer chains.
Halloween Art/Design Experiments
Design is a big part of STEM fields (or STEAM fields, if you like).
These Halloween STEAM activities will be a favorite with your class.
Middle schoolers will love the Design a Monster Engineering Activity. In this, middle schoolers can learn a bit about the technology used to create classic monsters in TV and old movies.
Make a 3D Blood Model using slime and other classroom supplies. Learn about the function and parts of blood!
Halloween Middle School Math Activities
These Halloween STEM activities have a big math component. If you get things wrong, your experiment will be a disaster.

Make this Edible Pitri Dish Bacteria and learn about the math behind following a recipe and the math behind microscopes!
Middles schoolers will have fun with these Halloween interger equations.
What middle schooler wouldn’t like pumpkin pi math?
These Halloween math puzzles are super fun for middle schoolers.
Bring some STEAM to math class with these Halloween math art challenges!
Try out these middle school Halloween STEM activities and have a blast this Halloween!
There is something spectacular about mixing Halloween with science.
It’s the perfect time to explore everything gross and disgusting in the science world!
Have fun, and Happy Halloween!