LEGO Marble Run
August 24, 2026
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This LEGO marble run activity is the coolest thing you’ll make all year with LEGOs. Simply build a racecourse out of LEGOs and use a marble to roll down it. Kids will learn about engineering, STEM, and basic physics. Whether you’re looking for STEM activities, LEGO activities, or just a rainy day activity, this is the one to try!
And if you’re looking for more fun LEGO activities, try this floating LEGO boat STEM activity!
LEGO Books For Kids
What You’ll Need For This LEGO Marble Run
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How To Make This LEGO Marble Run
1. Attach a large baseplate to a sturdy, flat surface.
2. Build a starting platform for your marble.
3. Create sturdy supports underneath the track so it won’t collapse when the marble rolls.
4. Build the track using long LEGO bricks, leaving enough space for the marble to roll smoothly.
5. Add walls along the edges to help keep the marble on the track.
6. Create turns by arranging bricks to gently guide the marble around corners.
7. Include fun features like tunnels, zigzags, or drops.
8. Continue building the track downward until it reaches the finish line.
9. Test the marble run by placing a marble at the top and letting gravity do the work.
10. If the marble gets stuck or falls off, adjust the height, widen turns, or add extra supports until it rolls all the way to the end.
11. Challenge kids to redesign their marble run and see if they can make it longer, faster, or include new obstacles.
Benefits Of This LEGO Marble Run
- Encourages engineering and STEM thinking through trial and error.
- Develops problem-solving and critical thinking skills as children test and improve their designs.
- Strengthens fine motor skills and hand-eye coordination while connecting small bricks.
- Builds spatial awareness by planning ramps, supports, and pathways.
- Introduces basic physics concepts such as gravity, momentum, speed, and cause and effect through play.
- Inspires creativity and imaginative thinking with endless design possibilities.
- Promotes perseverance as children make changes and improve their marble run after each test. Hands-on building activities like LEGO construction support cognitive development, creativity, motor skills, and problem-solving through interactive play.
LEGO Activities For Kids
LEGO Minifigure Craft– Have a kid that’s obsessed with stacking and building with LEGO bricks? This LEGO minifigure craft is an easy craft for all the LEGO-loving kids out there. Using scissors, glue, and construction paper, kids will get to design their very own minifigure!
LEGO Brick Suncatcher– There’s something magical about LEGOs and the creations kids build with them. From castles to ships, kids can create almost anything using simple colored bricks. So, why not display these colorful bricks on the windows, too with this LEGO brick suncatcher?
LEGO Marble Run
Build a LEGO marble run with kids! This fun, hands-on STEM activity encourages creativity and problem-solving using simple LEGO bricks.
- Prep Time: 20
- Total Time: 20
- Category: DIY, STEM
- Method: Step-by-Step
Materials
- LEGO bricks
- Large LEGO baseplate
- Marbles (use with adult supervision for young children)
- Flat building surface
Instructions
- Attach a large baseplate to a sturdy, flat surface.
- Build a starting platform for your marble.
- Create sturdy supports underneath the track so it won’t collapse when the marble rolls.
- Build the track using long LEGO bricks, leaving enough space for the marble to roll smoothly.
- Add walls along the edges to help keep the marble on the track.
- Create turns by arranging bricks to gently guide the marble around corners.
- Include fun features like tunnels, zigzags, or drops.
- Continue building the track downward until it reaches the finish line.
- Test the marble run by placing a marble at the top and letting gravity do the work.
- If the marble gets stuck or falls off, adjust the height, widen turns, or add extra supports until it rolls all the way to the end.
- Challenge kids to redesign their marble run and see if they can make it longer, faster, or include new obstacles.
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