Stable Structure STEM Challenges


Bridges and buildings need to be made from strong materials and cleverly constructed too. Some shapes make stronger structures than others. These simple investigations are all great for learning about strong shapes and stable structures in a fun and hands-on way.

A structure is a building made from several different parts.

Stable structure and building investigations for kids

1. Build a marshmallow and spaghetti structure.

A marshmallow and spaghetti structure is a fun ( and sticky ) way to learn about stable structures. Experiment with squares and triangles in the tower to find out which make the strongest building.

You can see in the image below that we had to place the spaghetti diagonally across the squares to stop it from collapsing.

marshmallow and spaghetti structure with a DUPLO winnie the pooh character on top.

We’ve also created an Easter/Spring toothpick tower version of this activity using plasticine and toothpicks to build towers for mini chicks.

2. Build a sugar cube arch

A sugar cube arch is another messy way to learn about strong shapes. You can see we slightly shaped the cubes so they fit together neatly.

sugar cube arch

3. Strong Columns

Find out why columns are often used to support buildings with this easy Greek architecture STEM challenge.

Column and lintel image

4. Strong Shapes

This simple science activity uses paper columns folded into different shapes to discover which shape is the strongest.

3 paper columns with different shapes for a how strong is paper experiment

5. How strong is an eggshell?

Find out why domes are such a strong shape using half eggshells!

eggshell bridge for a STEM challenge.
The bridge consists of 4 half eggshells with 4 books stacked on top.

6. Gingerbread Structures

Design, build and test structures made from gingerbread to find out which sticky substances hold them together the best.

Gingerbread house for a STEM challenge

7. Paper Arch STEM Challenge

This activity uses paper between books to test a flat bridge and an arch bridge to find out which can hold the most load.

paper arch bridge for a STEM challenge

8. Edible foundations – Earthquake STEM Challenge

This delicious earthquake investigation uses different edible foundations ( jelly, brownie and flapjack) to find out which supports a toothpick tower the best during a simulated earthquake.

Tower made from gummy sweets and toothpicks in a flapjack foundation ready for an earthquake investigation

9. Candy House STEM challenge

This candy house STEM challenge is delicious and a great learning activity too! Use sweets to build a house and test different sticky materials to hold it together.

More building and stability of structure activities for kids

Little Bins for Little Hands has a brilliant paper cup building activity.

Can you design an activity to find out which materials are the most flexible?

Raising Lifelong Learners has a brilliant mini wrecking ball challenge.

image shows toothpick and gummy sweet towers, bridges made from paper and toothpicks and marshmallow towers for stable structure STEM challenges.

Last Updated on April 26, 2023 by Emma Vanstone

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