The Exploding Ivory Soap Experiment

What kid doesn’t want to put something weird in the microwave and see what happens? Satisfy their curiosity with this easy (and super clean!) science experiment with Ivory Soap.


It’s important to use only Ivory Soap for this experiment. When Ivory is manufactured, they whip a lot of air into the bar creating little air pockets. When you heat it in the microwave, the air in those pockets expands and makes the soap grow and fluff up. Other soap bars will not have as much air and will not fluff up the same.

And while it doesn’t actually explode, it does look like it might at any moment as the bar at least triples in size and becomes a fluffy flakey white cloud-like blob. And you can still use it for soap afterwards!

The first thing I did was order this 3-pack of soap on Amazon for under $5, because if I can avoid driving to the store, I will. (affiliate link) I also wanted to have a couple extra bars so we could do it more than once and compare different blob effects.

Then you just remove the wrapper and put it on a plate and set the microwave for about two minutes. Our’s stopped growing just after one minute, but it depends on the strength of your microwave.

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It’s really neat to watch it grow! When you first take it out, it will be a little hot. Let it cool down, then try breaking it apart with your hands. This is the cleanest science experiment ever! The soap is still good to use afterwards if you don’t want to feel like you are being wasteful. You could sit it in a dish and have the most unique original soap sculpture hand soap in the neighborhood!

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We had a lot of fun with this one and it’s definitely the only science experiment so far that left the microwave smelling better than when we started!

How to Launch a Rocket with Baking Soda and Vinegar

Making a bottle rocket with baking soda and vinegar is always a fun and explosive (but safe) activity! When the baking soda reacts with the vinegar, it forms carbon dioxide and water. The carbon dioxide builds up inside the bottle until it launches into the air!

Here’s step-by-step directions to launch your own rocket:


Empty water bottle
4 Chopsticks
Markers (or paint, crayons, etc.)
Baking Soda
Paper Towel

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First Make Your Rocket:

1- Take a sheet of paper and color one side. This will be your rocket decorations.

2- Cut out a circle, cut a slit halfway, wrap it to make a cone and tape it in place. This is the top of your rocket.

3- Tape three or four chopsticks to the upside down bottle, with a few inches extending past the top opening. This will be your rocket legs, so make sure they are even and the bottle can stand on its own.

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4- Wrap the decorated paper around the bottle, over the chopsticks and tape into place.

5- Tape your pointy cone to the top. You should now have something that resembles a rocket!

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It may not be very pretty, but it will still fly! lol

6- Wrap tape around a cork until you can plug the bottle easily but not too tightly. If it is too tight, it won’t shoot out.

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Prepare to Launch:

1- Take a square of paper towel and put about a tablespoon of baking soda in the center.

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2- Wrap it up to create a little baking soda packet. This delays the release of the baking soda and gives you time to put in the cork and get out of the way.

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3- Fill your bottle about 1/3 with vinegar

4- Find a nice flat surface outside where you don’t care about the splatter. It makes a big mess when it explodes, but it is all easily washed away with water.

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5- Push the baking soda packet into the bottle and VERY QUICKLY put in the cork. Make sure it is secure enough but not pushed in too far or it won’t pop out.

6- Give it a few shakes, flip it over and then RUN!