When I brought out the spaghetti and marshmallows, I think my children thought we were having some kind of weird and wonderful dinner, not building structures.
This is a great STEM activity for children of most ages, as you can tailor it to their understanding. I let my 2-year-old build whatever she wanted, and she had a great time working out how to put the spaghetti in the right places. With my 4-year-old, we were a bit more structured and tried to build a tower.
Older children can think carefully about which shapes are strong shapes and will support their structure the best.
How to build a marshmallow tower
You'll need
Spaghetti ( uncooked! )
Marshmallows
Instructions
Snap the spaghetti into smaller pieces.
Push the ends of the spaghetti into the marshmallows to build different shapes for your tower.
We started with a cube, but when we put weight (Pooh bear in our case) on it, it started to lean very precariously to the right, and one of the vertical spaghetti pieces snapped. We then discussed what we would do to make it stronger. We decided to add some diagonal pieces, which seemed to do the trick.
We thought it would be fun to try lots of different shapes to see if we could break them. Straight lines and marshmallow corners tend to lead to triangles, but we had a lot of fun with other shapes, too.
Extension task
Make it a game. Challenge friends or family to see who can build the tallest tower!
Try miniature and then giant marshmallows. Which are easiest to build with?
Stable structure secrets
Triangles are great for making a stable structure.
Consider where the centre of gravity is in your tower. A wide base helps stability, giving a centre of gravity low down and central.
More engineering challenges
Discover why domes are so strong with this eggshell bridge!
Build a famous monument with newspaper!
Build bridges with different shaped paper and cardboard to investigate which is the strongest!
Frugal Fun for Boys and Girls has a fantastic LEGO bridge building challenge you might like too!
Last Updated on February 21, 2025 by Emma Vanstone
Kelly says
My son would also think spaghetti and marshmellows would make a great dinner!
Laura @ You, me & the mindee's says
Looks great fun, my 2yo would love this. Will definitely be trying it out x
Actually Mummy... says
GG and her class did this not long ago. The marshmallows looked a bit grubby by the time they were finished, and gradually the structures were missing bits! I hate to think what got consumed in the end!
maryanne @ mama smiles says
My kids love doing this, although we've always used toothpicks instead of pasta. Love the extra challenge pasta adds!
sunnymama says
This looks fun! 🙂
Susan Case says
Wonderful idea on the marshmallows!
ScienceSparks says
Thank you
Shiloh says
What a fun experiment! Were the marshmallows fresh? How many did you guys eat in the process? That would be my biggest problem.:)
ScienceSparks says
they were fresh, but older might work better? We ate uhm...several 🙂
@BlueBearWood says
Great fun. I'd have to buy 4 times the amount. 1 to build and 3 for the girls to eat!!
ScienceSparks says
ha ha, we did go through a lot!
RockerMom says
We did this a few weeks ago. We used mini marshmallows and toothpicks. The large marshmallows seem like they'd work better and the variations in possible lengths of the spaghetti would lead to more possibilities. Thanks for sharing!!
Angela says
My kindergarten did this a few weeks ago with toothpicks and marshmallows. The structure she made was so amazing! And she had a great time doing it too. I was delighted to receive a full explanation of how the structure she made works and how she added supports in different places to make it strong!
Jamie H says
Looks like fun! Knowing my girls though, they'd try to eat everything (including the raw spaghetti) before they actually made anything!
Ticia says
We did this before with toothpicks, but the extra challenge of pasta is kind of intriguing.
Thanks for linking to Science Sunday!
Carrie says
Oh, how fun!! Reminds me of my days teaching geometry. Thank you for sharing at Sharing Saturday!!