Tuesday, January 24, 2012

Ivory Soap Explosion

For the past few months, I kept reading about the amazing results you get by sticking a bar of Ivory Soap in the microwave.  Then just a couple weeks ago, I saw it here and I knew I wanted to try it here with my kids.  

Let me tell you, if you don't have any Ivory soap in the house, pick it up on your next shopping trip, because this is what you'll get...


Pretty cool, isn't it?  And it's so super easy.  Just pop your soap in the microwave (it'll only work with Ivory), put it on high for about 2 minutes and watch it expand like crazy. (Note:  Different microwaves may be stronger than others.  Your soap may be finished expanding sooner, just watch it carefully )


Just heed my warning, though.  I didn't go back to reread the post where it directed you to cut your soap into pieces first.  I popped the whole thing in, then had to push my oohing and ahhing kids aside before the growing blob completely filled my small microwave!

She loved it!

Be careful at first, because it is fairly hot when it first comes out of the microwave.  However, it cools down quickly and can be easily handled.  I thought it would be sticky or slimy feeling, but it was actually dry and a bit crumbly.  The kids had fun touching it and breaking it apart.  (and it was really easy to get them in the shower with a promise that they could break off a clump of the exploded soap to use to wash up!)

I think I'm going to have to keep a few bars tucked away in the closet and pull it out whenever we need a little fun before bathtime.

Oh, and there's some scientific principles behind it too.  Basically, in the manufacturing process, tiny air pockets are formed in the soap (that's why Ivory floats).  When heated in the microwave, the moisture in those air pockets changes to a gas and expands.  (I told my kids it was similar to what happens with popcorn ~ but you can read more about the science part of it in more detail here at Steve Spangler Science

Sharing our cool soap experiment at: 


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20 comments:

Chrissy @ The Outlaw Mom Blog said...

I've seen this around, but haven't tried it yet either - thanks for the tip about cutting the bar up! Going to try this soon!

rachelle | tinkerlab said...

I love this experiment and think we need to take it into the bath next time we do it! I threw the whole bar of soap in the microwave without too much trouble, but maybe my oven is a bit bigger than yours? In any case, GREAT advice to cut it into thirds as a precaution. Sorry you had to learn the hard way.

Laura said...

Rachelle, yes I do have a small microwave, but boy was it really expanding! It was reaching the sides of the microwave and overflowing the plate when there was still half a bar left! Plus, if you cut it into pieces, you'll have plenty to keep re-doing the experiment! :)

Abby said...

We did this this summer, and the next night I put the soap in the blender with a little water and some food coloring, and mixed it into a pudding like consistency. Then I filled ziploc bags up with it, snipped off a corner, and let my children have it in the bath, with their "paint". It was a great time.

I blogged about it here:http://ahouseof.blogspot.com/2011/06/science.html

Heather@ Creative Family Moments said...

Added to my shopping list - looks so fun!

Natalie said...

Okay, that is seriously awesome. Thanks for sharing, I can't wait to try this!

Victoria said...

This has been on my to-do list for a while. I'm so excited to try it. Thanks for the tip about cutting it. I like the idea of keeping it under control AND having more chunks left over to play with another time.
Does it still seem to wash the same after the microwave process?

Laura said...

Victoria, yes, it seemed to wash the same. It was crumbly, but still produced suds and my kids looked clean ;)

Jena @ HappyLittleMesses said...

we've tried this and also found a great recipe that uses the crumbled pieces of expanded soap for bath paint. Here's the link to the recipe: http://www.housingaforest.com/fluffy-bathtub-paint/. Visiting from Living Life Intentionally

Sarah Grace said...

i have to do this!

Hannah Sommerville said...

I've always wanted to do this! looks like so much fun. Thanks for sharing :)

Mom to 2 Posh Lil Divas said...

haha, it does expand more than you'd think doesn't it! It was awesome to watch - I was too chicken to throw in the whole bar at once!

Thanks for mentioning us as your inspiration! :)

Nice that you used it in the bath - my girls were not saving it! They wanted to play & explore till there was no more, haha!

Molee said...

This looks like a blast! My 2 year old girl and a 4 yr old boy will be doing this for a play date tomorrow!

Molee said...

This is on today's agenda! Thank you so much for the idea! I linked you to my blog!

Anonymous said...

I'm so glad I actually read your post because this seemed really weird at first but now I am intrigued and my son LOVES science. Thanks! dawn

Jenny said...

That looks so cool, and your daughter looks so happy :)

Alicia said...

Be careful what you put it on. It burned a hole in a plastic plate that had been in the microwave many times before and never had a chance to expand much. I'll have to try again.

Laura said...

Yikes, Alicia! So sorry that happened to you. I'm going to edit the directions so people can watch theirs carefully. I'm guessing it might have something to do with the different strengths of some microwaves.

Anonymous said...

Love this and we are actually doing this for the 4th grade science fair! YAY!!

Anonymous said...

My brother's science teacher told him about this, so he decided to try it yesterday. The problem was, he didn't know you had to use Ivory soap. So he popped some random soap in the microwave. It puffed up for about 2 seconds, then fell flat. And it stunk. Really, really bad. His lesson learned: know specifically what materials you need to use or risk disaster. I can still smell it now.

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