Build a LEGO Volcano

I bet you never thought to pair your LEGO basic blocks with a cool kitchen science chemical reaction? I didn’t either until my son suggested we build a LEGO volcano one morning. This is the perfect STEM experiment for hands-on learning that will keep your kids busy anytime. We have tons of unique ways to use your LEGO for early childhood learning! This would even make a fascinating LEGO science project.

COOL THINGS TO BUILD WITH LEGO: MAKE A LEGO VOLCANO

FIZZING LEGO VOLCANO

There’s nothing better than baking soda and vinegar experiments to explore chemical reactions! It is one of our go-to classic science experiments and we have loads of fun variations. This time for LEGO week, we made a LEGO volcano.

We are really hitting the little LEGO bricks stage of my son’s development and have had fun coming up with creative LEGO activities! My son loves making volcanos and he even suggested building this LEGO volcano.

ALSO TRY: BUILD A LEGO DAM

Let’s get started building a LEGO volcano!

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HOW TO BUILD A LEGO VOLCANO

Build your own LEGO volcano! I am not a master builder and my son is only 5. But we had a great time figuring out together how to make this LEGO volcano actually look like a volcano. We sorted through all our colors for black and brown bricks. We highlighted our volcano with red and orange bricks for lava.

Kids of all ages will love working with you independently with friends and siblings to build a volcano model!

I put a test tube from our science kit in the middle of the LEGO volcano. Any narrow jar or bottle you can build around will work. Try a spice jar or mini water bottle. I showed him how we could start the bricks out wide and taper them in towards the test tube to form a volcano.

We added all the brown and black pieces we could find to make our LEGO volcano look mountainous and “bumpy”.

Learn about volcanos! You can read more about types of volcanoes here with our homemade salt dough volcano experiment. This volcano activity is another great way to occupy time and extend the classic baking soda and vinegar reaction.

YOU WILL NEED:

Baseplate
Small bottle (preferably with a narrow opening)
LEGO bricks
Baking soda
Vinegar
Dish soap
Food coloring
Bin, tray, or container to set the baseplate in to catch the overflow.

STEP 1: Build a volcano model around your chosen container!

I left cracks or gaps around the LEGO Volcano to let the lava flow through!

STEP 2: Fill the container inside the LEGO Volcano with baking soda. I filled our container about 2/3 full.

STEP 3: Mix vinegar with red food coloring if desired. I ended up having to use apple cider vinegar. Usually, our experiments just include baking soda and vinegar. This time I squeezed a few drops of dish soap into the vinegar and gently stirred.

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The dish soap I added gives a much frothier eruption with fun bubbles too!

I gave my son a turkey baster to continue the LEGO volcano eruptions. You can deliver the vinegar directly onto the remaining baking soda this way. It makes a cool eruption that keeps on going!

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It kept on going…..

….and going! Check out those bubbles!

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MORE BAKING SODA AND VINEGAR FUN TO TRY:

THIS LEGO VOLCANO WAS A REAL CROWD PLEASER!

Click on the link or on the image below for more awesome LEGO activities for kids.