When it comes to kids' hands-on science activities I'm like a well-seasoned cookbook author. It's hard for me to find a procedure I haven't seen before in some incarnation or other. I own a library of kids' activity books going back to the 19th century. I've scoured children's magazines and the internet collecting files of printouts for future use. And of course there is my own extensive experience of prowling up and down supermarket aisles looking for products that could reveal some scientific principle other than the consumer purposes they are designed to meet. Often, at schools, kids will share the science tricks they know with me. So far, thousands of tricks later, there have been no surprises. So when I come across something simple to do and very revealing about a familiar subject that I have never known before, it is a true "Eureka!" experience, which I figure is worth the price of the book. Here are a few of them.While researching one of my newest books, Your Body Battles a Cold, I was speaking to a children's cold researcher, Dr. Birgit Winther, at the University of Virginia. She told me that the nose is like a computer. If you breathe down on a mirror, your nostrils will leave two circles of condensation, one larger than the other. That's because one nostril is dominant and taking in more air than the other one. If you do this several hours later, the other nostril will be dominant. In other words your nostrils take turns, alternating the one that takes in the most air and you don't even know it! On the day I learned this delightful factoid I happened to have a dentist appointment. I excitedly shared my discovery with my dentist. She was equally delighted to learn it because she looks at people's nostrils all that time and had noticed the discrepancy in size. Now she knew why.
Whenever possible I've learned there is nothing like first-hand research. So I visited a Herr's potato chip factory while researching Junk Food. Proper packaging is the secret to giving potato chips a shelf life. Chips must be protected from light and oxygen (there's an obvious experiment here to prove this) so they are sold in foil-lined light-proof bags filled with nitrogen gas, which also cushions them against breakage. "Aha!" I inferred. Since nitrogen doesn't support combustion I figured that you can extinguish a flame with a bag of potato chips. The procedure for doing this is in the book.
Interviewing scientists at the Monell Chemical Senses Center, I discovered that you can taste hot peppers with your wrist! Here's a video I made to prove it. Here's another video to prove that you can toast a marshmallow with a nut. And here's one that shows the difference between regular and diet sodas as measured by density. Most of the time I don't include the scientific explanations in the videos but in this last one, I thought I could take one small step in fighting childhood obesity by explaining the difference in density between diet and regular sodas. In fact, my book We DareYou! is full of such discoveries along with their scientific explanations.
The great joy in my work is stumbling across new insights about the nitty-gritty of daily life that most people never stop to think about. There are more of these unique discoveries in my books than I can count. I love that I can share them with my readers and I hope my writing conveys my enthusiasm with the implicit invitation: "You gotta try this!"
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