Of the children do not like mysteries? Teach them to write secret messages to each other. Divide the children into two teams. One will prepare a secret message, and the other - to receive it.
Secret message nobody should see. To prepare it, you need lemon juice or milk.
Using a brush, make a message on a piece of paper and let it dry out a bit. Now adults do not know that there's something written.
But it is necessary to warm up a little sheet, for example by means of iron, and the message can be read at once!
Comment by Professor Nicolas: "When we have a hot iron on a piece of paper, our" ink "just burn and become dark - that's why you can see them now!"
Gratitude for photographic materials and assistance in preparing this article, we thank Professor Nicolas. Many wonderful experiences you will find on his website "Scientific show mad professor Nicolas."
Or you can invite professors to him and hold interesting experiments together. And if you feel strong enough, you can buy kits for home runs.
#bigpicture.RU
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