Top 20 Fall STEM Activities for Kids

Today we’re going to be talking about the Top 20 Fall STEM Projects for Kids!

We love STEM projects at our house. Punky’s favorite things to do are engineer things out of lego or make the messiest science projects available. This weekend we’re going to complete some of the activities on The Top 20 Fall STEM Projects for Kids. I’ll take pictures and write an update post for next week. The one he’s most excited about for our Winter Fall STEM Activity list is hot ice!

To go to any of these projects below, click on the pictures provided. You will be forwarded in a different tab to the relevant pages.

Pumpkin Launch Lego Catapult Challenge

As a mom with a boy who is obsessed with Lego, the Lego catapult is a fun way to teach engineering! Sarah from says you can launch candy pumpkins or plastic Lego balls as ammunition that is safe so no one will become injured in the process.

Glow Salt Circuit

I think this project is really fantastic. While it’s not strictly Fall related, Punky’s class is learning about circuits in school right now, and this is a great way to incorporate those lessons here at home in a fun and engaging way.

Salt Crystal Leaves

Erika over at Living Well Mom did this activity with her kids using both real leaves and pipe cleaner leaves. This is a great activity for both younger and older kids. Younger kids will love seeing the shapes of the crystals develop, and older kids can dive into the reasoning behind crystal formation.

Pumpkin Volcano

Who doesn’t love a science experiment that gets a little bit messy? Punky always says “The messier it is, the more fun it is!” This volcano project is the same one you did as a kid – you made the paper mache volcano and added the baking soda and vinegar solution. This one adds a bit of dish soap to make the “lava” a bit more bubbly, and there’s no paper mache necessary! You can also do this experiment with apples. You can find the post by Kim over at The Resourceful Mama.

Glow in the Dark Jello

I’m sure you’re wondering why Jello (or jelly in the UK) is on this list. Well, gelatin-based objects are a type of natural polymer! You can teach your kids all about different types of polymers using this experiment, or if you want to just have a bit of fun, shine a black light on your glow in the dark jello! We’ll be using our Millennium Falcon silicone molds for this project (because we love a bit of Star Wars in our home and we don’t have leaf-shaped ones yet). You can find this project from Steam Powered Family.

If you’d like an easy “cheat sheet” about natural gelatin polymers you can find it here.

Why do leaves change color?

This one is a fantastic way to teach children about chlorophyll and the leaf life cycle! There are a few basic tools you’ll need, but the dominant one is isopropyl alcohol (rubbing alcohol). You can find this experiment from Sarah over at How We Learn.

Flying Teabag Ghosts

I know this is Halloween themed, but for kids, ghosts are popular year round. This project involves lighting the tea bag on fire which requires adult supervision, so please be sure to do this in a space that won’t easily catch on fire (like outside!). This experiment focuses on air density and convection currents. You can find the Flying Teabag Ghosts from Katie over at

Building Activities with Candy Pumpkins

This building activity is a great one for your kids not only to build fantastic structures, but they will also be building their critical thinking skills. If you can’t find jelly pumpkins, you can use any type of soft-ish sweet. We have used gumdrops, marshmallows, Haribo gummy bears, and more! You can find this activity from Dayna over at Lemon Lime Adventures.

Apple Races

Explore physics with your kids in this fabulous apple race activity! You can use plastic rain gutters or even long cardboard boxes or poster tubes. Anything big enough for an apple to fit through will work! You can find the Apple Race physics experiment over at Little Bins for Little Hands. Why do pine cones open and close?

This activity is great for anyone who is curious about pine cones. We typically have a ton floating around the house because Punky and I pick them up during our walks through the woods. Did you know that pine cones open and close according to moisture levels? You can find this simple experiment by Stephanie over at Parenting Chaos.

Apple Cloud Dough

Cloud dough is truly inexpensive to make, and you can scent it however you’d like (I like to make gingerbread cloud dough). It is extremely messy though, so be aware of this before you start this craft! Cloud dough is great for all ages; I sometimes like to play with it too ;). You can find Crystal’s recipe for Apple Cloud Dough over at Growing A Jeweled Rose.

Apple Oobleck

Explore non-newtonian fluids with this superb Apple Oobleck recipe! A non-newtonian fluid is one that can display properties of being both a solid and a liquid dependent on the amount of pressure applied. It is great fun for children and adults alike! This is also a great afternoon activity for kids who love playing with slime. Why not throw in a little bit of dry oatmeal to see how the texture changes? You can find the Apple Oobleck recipe over at Little Bins for Little Hands.

Make a Pumpkin Clock

Did you know that you can power a clock using a pumpkin? I didn’t either! This experiment requires you to buy a potato clock kit which you can find on Amazon here (not an affiliate link) unless you have all of the materials available (LED clock, copper and zinc strips, wire, transparent tape, etc) laying around. It’s less than £12 though, so not a huge expense for hours of reusable fun! You can find the details of this experiment from Little Bins for Little Hands.

Measuring the circumference of a pumpkin

Put your kiddo’s math skills to work by measuring the circumference of a pumpkin! You can also measure other types fall objects such as pinecones, apples, measuring the width and height of leaves, and more. You can find this easy fall math activity from Katie at Gift of Curiosity.

Spider Web Vibrations

Learn how spiders use vibrations in their web using yarn or string! You can find out more about this activity from Chelsey over at Buggy and Buddy.

Scarecrow Place Value Math Activity

I think this craft is great because your kids will use their fine motor skills as well as their math skills. You can make the math activity age appropriate. Find more information about the Scarecrow Place Value Math Activity from The OT Toolbox.

Leaf Rubbings

Leaf rubbings are a fantastic way for kids to see the structure of a leaf as well as make a lovely piece of fall art. You can find out more about this at

Why do sliced apples turn brown?


I did this experiment for my science fair when I was in elementary school. I didn’t win a ribbon, but it was fun educating my classmates about why apples turn brown (hint: the surfaces of the apple oxidize when exposed to air). You can find out more information on this project at Little Bins for Little Hands.

Pumpkin Science; Rotting Pumpkin

Have your children record their observations in a little journal about what they can see, smell, and feel during the decomposition process of a pumpkin. It can get pretty gross as the pumpkin continues to decompose, but you can always end the experiment when the pumpkin begins to mold. Find out more information about this experiment at Confidence Meets Parenting.

Pumpkin Geo Board

Make a geoboard out of a pumpkin! Your kids will love exploring math in a 3D experience. You can even challenge your kids by asking them to make as many geometric shapes as they can! Find out more about this project at


And there you have it! Our Top 20 Fall STEM Projects for Kids. What did you think about these projects? Are there any on the list that you’ll do with your kids? Leave a comment below and tell us!

If you’re looking for more STEM projects for kids, head on over to our huge list of 100 Halloween Crafts and STEM Activities for Kids post!