1347

Secret letter


Let your child on a blank sheet of white paper to make a drawing or inscription milk, lemon juice or vinegar. Then heat the sheet of paper (preferably on a device without an open flame) and you will see how the invisible becomes visible in. Improvised ink to boil, darken letters and secret letter can be read.
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...
The reason for the “old whine” to marry a neighbor after thirty years of marriage
...
Why do you add vinegar when cooking rice?
...
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...
The Aim
...
You and your work *
...
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...
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...
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...
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