15 Halloween STEM Activities For Kids Of All Ages

The perfect activity for unwanted Halloween candy! Kids can learn about tension, kinetic energy, potential energy, and more while building this catapult.

This is a really cool activity that combines crafts and geometry. These kaleidocycles are pretty fascinating to play with!

These are so fun to make and will keep kids of all ages entertained for a while.

Use Halloween as an opportunity to teach little ones about bones, skeletons, and their purpose, all while practicing fine motor skills and scissor skills! While this skeleton is not anatomically correct, you can always get a book about the human body for kids so they can learn more if they're interested! My 6 year old LOVES books like this.

This is a super easy activity to do with supplies you already have around the house. If you have really little kids, you can teach them about solids and liquids. For older kiddos, talk about acids, bases, and chemical reactions.

Older kids can learn about the chemical reactions that make slime. Younger kids can learn about measuring out ingredients. Everyone can enjoy playing with this perfectly stretchy slime! Add some Halloween sprinkles if you want to add texture to this slime.

Can you make a battery out of a pumpkin?? Yes, you can! And you can teach your kids how to do it too!

These spinners were always fascinating to me, and these Halloween designs disappear like magic! Kids can learn about art, colors, and tension in this easy activity.

This is always a fun experiment to do to teach kids about how baking soda and vinegar react, and using corn is the perfect Fall-themed way to show this!

This is a great activity for older kids who are able to draw straight lines and focus on a task for several minutes at a tiem. Use the secret code to draw a secret picture with this FREE printable!

This is a great activity for preschoolers and kids learning how to count, and the best part is it uses leftover Halloween candy!

And if you've got a preschooler interested in math, here are some great preschool math activities!

Spiders! Magnets! A fun activity for kids of all ages—you can decide how much of the prep work the kid gets to do depending on their age.

Playing with dry ice is always fun and spooky! This is for older kids who can follow directions to not touch the dry ice or water with their hands.

This is another great Halloween math activity for really little ones who are just learning how to count.

This Halloween activity combines art, crafting, and chemistry. It's definitely for the kids who enjoy the process of fiddling around with art and are not simply waiting for the end result. Playing with all the supplies while learning is fun!

This one takes some prep work from the parents, but it is SO FUN to set up an escape room at home for your kids. This activity is perfect for older kids who will need to use logic, reasoning, and thinking outside the box to solve this escape room. It's a printable activity that will walk you through what to do.