CrunchLabs-Inspired Science Birthday Party Ideas for Kids

If your kid loves science experiments, building things, and watching Mark Rober videos, a CrunchLabs-inspired birthday party is SUCH a fun theme!

My son Luke is a huge fan of CrunchLabs, so for his 8th birthday, we decided to turn our backyard into Luke Labs: Experiment 008.

We had engineering challenges, bubbling science experiments, a DIY drink lab, and some seriously exciting science demonstrations.

The best part? Most of the activities used pretty simple supplies, and the kids got to actually DO the experiments instead of just watching someone else.

Here's everything we did for our CrunchLabs-inspired science birthday party!

CrunchLabs-Inspired Science Birthday Party Ideas

If you're planning a science or STEM birthday party for kids, here are all of the activities, decorations, and ideas we used!

Science Birthday Party Decorations

For the decorations, I wanted the party to feel like a real science lab, but with a fun, colorful, CrunchLabs-inspired look.

We called our party Luke Labs: Experiment 008, a little nod to Luke turning 8!

I designed a custom Luke Labs logo and used it throughout the party on signs, decorations, and other little details.

We also had a custom birthday banner printed and made signs for each of the activity stations. I print these at Walgreens - ALWAYS search for a coupon code, I got these for under $20 (for both the banner and poster together!) thanks to a coupon.

I LOVE using themed signs at kids' birthday parties. They instantly make a table full of supplies feel like an official activity, and they're such an easy way to pull the whole theme together.

I just designed these in Canva and printed them at home and put them in these tabletop frames! I printed front and back!

We kept the party in our backyard so the kids had plenty of room to spread out, build things, and get a little messy.

At Luke's insistence, we also had a bounce house! It really added something big and fun for the kids to do! He's had a bounce house every birthday since age 3, so it's a given for him!

I always love having something like a bounce house at a birthday party because it gives the kids something to do between activities without needing every minute scheduled.

LEGO Engineering Challenge

Our first big activity was a LEGO engineering challenge!

This was such a perfect fit for our CrunchLabs theme because it combined building, creativity, and a little friendly competition.

We set up our LEGO table and let kids build at their own leisure throughout the party.

We gave the kids LEGO bricks and challenged them to build the tallest tower they could.

But there was a catch!

Their towers also needed to be strong enough to survive an earthquake test.

The idea was to get the kids thinking like engineers. It's not just about building something tall. You also have to think about how stable it is and whether it can actually hold up.

We let the kids build their towers and then tested them to see which ones could survive shaking.

I love activities like this because there's no single right way to build a tower. Kids can experiment with different designs, see what works, and make changes along the way.

And since so many kids already love LEGO, it's an easy activity to get everyone excited about.

You could absolutely recreate this challenge with whatever building bricks you already own!

Egg Drop Challenge

This was another activity that felt straight out of a CrunchLabs video!

For our Egg Drop Challenge, the kids worked in teams to design and build something that would protect a raw egg from a big drop.

The goal was simple: build a contraption that would keep your egg from cracking when dropped from up high.

We gave the teams building supplies and let them come up with their own designs.

The building supplies were all recycled materials that I saved up for about a month leading up to the party. Think about things like bubble wrap, packing material, cardboard boxes, and even toilet paper rolls. I also ordered a big pack of masking tape, so the kids could hold it all together!

Some kids focus on cushioning the egg, while others try to create a structure that absorbs the impact.

Once everyone finished building, it was time for the big test!

We dropped each team's creation from up high to see whether their egg survived.

I also love that this activity gets kids working together. They have to share ideas, make decisions, and figure out how to turn their plan into something that actually works.

And the suspense of seeing whether the eggs crack makes the whole thing feel like a big event!

This was such a HUGE hit, the kids LOVED it and many built several different designs!

Science Drink Lab

Of course, we had to have a Drink Lab!

Instead of just setting out regular drinks, we let the kids mix their own colorful concoctions in little science flasks.

For the drinks, we set out different options including:

• Sprite
• Lemonade
• Grenadine
• Blue curaçao syrup (nonalcoholic)
• Lemon flavored syrup

The kids could combine different flavors and colors to create their own drinks.

This was such an easy way to turn something we were already going to serve into another fun activity.

You definitely don't need an elaborate setup for this. A few colorful drink options and some fun containers are enough to make it feel like a real lab!

Oobleck Sensory Station

We also made a big batch of oobleck for the kids to play with!

If you've never made oobleck before, it's a mixture of cornstarch and water that behaves in a really interesting way.

When you press or squeeze it quickly, it feels solid. But when you relax your hand, it flows like a liquid.

It's such a cool science experiment because kids can actually FEEL the difference!

We made a big batch and put it in a cauldron for the kids to explore.

The basic oobleck recipe is:

• 2 parts cornstarch
• About 1 part water

Add the water gradually and mix until you get the right consistency. You want the mixture to feel firm when you squeeze it but flow when you let go.

The exact amount of water can vary, so I recommend adding it slowly instead of dumping it all in at once.

This is a great open-ended activity because the kids can come and go throughout the party.

There's no real goal or challenge. They can just play, experiment, and see what happens when they squeeze, scoop, or let the oobleck drip through their fingers.

It is definitely messy, though! We set out wipes, but some kids wanted to wash in the sink.

I'd recommend keeping this station away from anything you don't want covered in cornstarch, especially a bounce house.

And when you're done, scrape the oobleck into the trash rather than washing a big batch down the drain.

Blast Off Station

We also set up a Blast Off Station with a couple of activities that felt very NASA-inspired!

This wasn't really a science experiment, but launching rockets and practicing your aim felt like a fun fit for our engineering theme.

We had two activities:

• Stomp Rockets: The kids could load foam rockets onto launchers, stomp on the air-powered pads, and see how high they could send their rockets flying.
• Nerf Blaster Target Practice: We set up a rotating target and let the kids practice their aim with a Nerf-style blaster.

I loved having this station because it was something the kids could do completely independently throughout the party.

The stomp rockets were especially fun because kids could experiment with how hard they stomped and the angle of the launcher to see how it changed where their rockets went.

And the rotating target added a little extra challenge to the blaster activity!

This was a great way to add some active play between the more structured science experiments and engineering challenges.

Plus, what kid doesn't love launching a rocket?!

Pro tip: Set this station up away from the other activities so the kids have plenty of room to launch their rockets safely.

Fizzing Flask Science Experiment

This was one of my favorite hands-on science activities because every kid got to make their own bubbling experiment!

Before the party, I prepped small triangular plastic flasks with a dry mixture of:

• 2 teaspoons baking soda
• 1 teaspoon citric acid
• ½ teaspoon cornstarch

I also set out larger beakers filled with different colors of glitter and sprinkles so the kids could customize their experiments.

Each kid could add whatever glitter and sprinkles they wanted to their flask before adding water to activate the reaction.

We gave them two ways to experiment:

Option 1: Use a pipette

The kids could add water a little at a time with a pipette to create small bubbling reactions.

This was fun because they could keep adding little drops of water and watching the mixture fizz again and again.

Option 2: Pour in water

For a much bigger reaction, they could pour water directly into the flask.

This created a more dramatic, volcano-like eruption with bubbles fizzing up and out of the top!

I loved that the kids could control how big or small their reactions were.

It's also a really simple experiment to prep ahead of time since you can measure out all of the dry ingredients before the party.

Pro tip: Definitely do this one outside or on a tray! The bigger reactions can bubble right out of the flasks. Keep the flasks open during the experiment, and make sure kids know these mixtures are not for drinking.

Elephant Toothpaste and Coke & Mentos Science Experiments

We saved some of the biggest science experiments for a special demonstration!

My husband Sean took over as the head scientist for this part of the party.

And naturally, we had to do TWO classic experiments!

Elephant Toothpaste Experiment

Elephant toothpaste is one of those science experiments that looks absolutely wild when it works.

The reaction creates a huge amount of foam that shoots up and spills out of the container, looking like a giant tube of toothpaste.

This is such a fun experiment for a science-themed birthday party because it's really dramatic and exciting to watch.

It's also a great opportunity to talk about chemical reactions and how different ingredients interact.

We had an adult handle the demonstration while the kids watched from a safe distance.

If you're planning to do elephant toothpaste at your own party, make sure to choose a kid-appropriate version using household-strength hydrogen peroxide and follow a tested recipe with proper safety precautions.

Coke and Mentos Experiment

Because apparently one giant science reaction wasn't enough, Sean also did a Coke and Mentos geyser!

This is another classic experiment that kids absolutely love watching.

You add Mentos candies to a bottle of Diet Coke, and the soda shoots up in a huge geyser.

It's simple, dramatic, and a perfect fit for a CrunchLabs-inspired party.

We did this outside with plenty of room because the soda can shoot surprisingly high!

I love grouping these bigger experiments together at the end of a party because it creates a really exciting finale.

The kids get to spend most of the party doing their own hands-on activities, and then everyone gathers to watch the big demonstrations.

Science Birthday Party Food

For the food, we kept things pretty simple.

With so many hands-on activities and experiments happening, I didn't feel like we needed to spend a ton of time making elaborate science-themed snacks.

And I'm glad - because the kids were too busy to do much eating.

I think this is one of those party themes where the activities really do most of the work.

The Drink Lab already added a fun science element to the food and drinks, so there was no need to make every single snack look like an experiment.

Science Birthday Party Favors

For party favors, we wanted to send the kids home with something that fit the science theme AND that they would actually use.

We went with little volcano experiment kits!

I love this idea because it gives the kids another experiment they can do at home after the party is over.

It's also a fun alternative to filling a goodie bag with a bunch of random little toys.

We added a custom Luke Labs favor tag that said:

"It was a BLAST! Keep experimenting at home!"

I thought this was such a cute way to tie the favors back into the party theme.

And since the kids had spent the whole afternoon building, testing, and experimenting, it felt like the perfect little send-off.

THESE ARE THE VOLCANO KITS WE USED!

A Fun CrunchLabs-Inspired Science Birthday Party

I loved how this party turned out because it really felt like a day designed around the things Luke loves.

Instead of just decorating with science-themed supplies, we turned the whole party into a series of experiments and engineering challenges.

I think the biggest thing that made this party work was having a mix of activities.

Some were structured challenges, some were open-ended experiments, and some were big demonstrations that everyone could watch together.

Plus, we had the bounce house for kids who just wanted to run around and play.

You definitely don't need to do ALL of these activities to throw a fun science birthday party.

Pick a few that fit your child's interests, add some lab-themed signs, and let the kids get experimenting!

And if your kid loves CrunchLabs and Mark Rober as much as mine does, I think they'll absolutely love having their very own science lab for the day.