Build a Monster STEM Activity with Magnetic Shapes
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Looking for a playful, hands-on learning activity for kids that encourages creativity, spatial reasoning, and fine motor skills? Try this Build a Monster STEM activity using magnetic shapes! Inspired by the classic children’s book Go Away Big Green Monster by Ed Emberley, this craft-based learning game is a fun and interactive way to explore shapes and design.
This build-a-monster activity is especially fun for Halloween! Kids can create silly, spooky, or completely ridiculous monsters while practicing shapes, spatial reasoning, and early STEM skills. Use it as a Halloween math center, preschool activity, classroom party station, or an easy hands-on activity at home.
What You’ll Need:
- Clean tin can (or metal baking sheet for larger play area)
- Magnetic tape or adhesive magnets
- Printable Monster Builder Template (available in my shop!)
- Scissors
- Optional: crayons or markers for customization
How to Do the Build a Monster Magnet Activity:
- Print & Cut: Download and print the monster pieces. Cut them out carefully.
- Add Magnets: Attach magnetic tape or dots to the back of each piece.
- Decorate Your Can: You can paint or decorate your tin can to make it extra fun!
- Start Building! Let your kids design silly monster faces and bodies by mixing and matching different shapes.
This activity is fantastic for preschool through early elementary kids. For non-readers, the visual cues make it easy to follow.
Educational Benefits of the Build a Monster Activity
- STEM Learning: Encourages design, engineering, and problem-solving skills
- Geometry Basics: Recognize and manipulate shapes (great for early math!)
- Fine Motor Skills: Cutting, sticking, and placing help build dexterity
- Emotional Expression: Use the monster faces to talk about emotions and feelings
Game Extension: Roll-a-Monster
The printable set includes a fun roll-a-monster dice game. Each number on the die corresponds to a monster feature (eyes, arms, mouth, etc.). Roll to see what you get and create your own unique monster!
Play Ideas & Extensions
- Storytelling: Have kids name their monsters and tell a story about them.
- Monster Emotions: Make happy, sad, silly, and surprised monsters to talk about feelings.
- Math Fun: Sort the monster pieces by shape, color, or size.
- Add a Spinner: Instead of dice, use a paper spinner for another fun variation.
- Try Building these cute Recycled Tin Can Robots
Grab the Printable Monster Builder Set!
Want to make setup easy? My printable Monster Builder Set includes more than 30 mix-and-match monster parts plus a printable game die for the Roll-a-Monster activity. Print the pieces, add magnets, and kids can build a whole collection of crazy creatures again and again.
This is available in my shop. Grab them here!
$3.50Add to cart
Book Pairing
Pair this activity with the book Go Away Big Green Monster for an engaging storytime and creative project that helps children conquer fears and express themselves through art.
See More Shape Activities from My Site:
Cloud Shapes- 2D Shapes Name Cards
Check Out More Halloween Themed Ideas:
Spider Web Snowflakes: Halloween Craft + Math
Halloween I-Spy Coloring Printable
Pumpkin Slime Science: A Fall Sensory Experiment for Kids
Twirligig Pumpkin Paper Spinner Toy
