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How Diapers Work – Science Experiment for Kids

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This is such an interesting experiment for families to learn how diapers work with a simple science experiment.

How Diapers Work - Science Experiment for Kids - this is such an interesting, practical science experiment that families will enjoy trying together. Great for helping kids to be curious and ask questions about how things around them work. (Summer science, science camp, homeschool, preschool, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade 6th grade, science, science fair)

Science experiment for Kids

Have you ever wondered how diapers work?  In this hands-on how diapers work science experiment for kids you will find out!
This is a fun, hands on science experiment that is particularly interesting to older siblings who have younger kids in diapers. Come take a peak at how you can learn how this polymer science experiment will show you diaper science.

Polymer Science Experiment

I highly suggest explaining polymers to kids with this easy, colorful polymer chemistry experiment.
pull the insides of a diaper out and put them in a cup
Start by getting one diaper (any brand/size).
Next pull out half of the inside lining of the diaper and put it in a cup.
Add water and watch as the polymers in the diaper lining absorb the water.

The word polymer means a long chain of molecules. In this experiment the water molecules were combined with the polymer in the diaper lining. This is what makes diapers swell when full, and keeps the moisture off the babies bottoms.


Just like in our other easy, colorful polymer science experiment we put salt on the polymer (fluffy diaper lining that has absorbed the water). Salt breaks the bonds and you will see liquid start to separate, not as much as in our other experiment – but it does break the bond all the same.
We decided to explore how swim diapers are different.  We pulled out the lining just like with with original experiment. We noticed the texture was different (no grainy balls, but more like thick wipes). We poured in water and watched. we discovered there were no polymers in swim diapers. It was absorbent, but did not bind together to get rid of the liquid like in regular diapers. So salt, had no effect.
What we deduced was swim diapers wouldn’t work well in water as they absorb way too much liquid around them and two, the salt (or chemicals) when kids swim would break apart the polymer bond and cause the liquid (pee) to seep into the water.
HINT: So when you take your little ones to the pool or beach this summer, make sure you change those swim diapers frequently because all the waste material is sitting against their bottoms AND can the liquid can easily seep out into the water.

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com

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