Probably, each of you will find in your childhood memories how rich and amazing life was at that time. Every day brought many new discoveries. On the margin of an ordinary pond one could spend hours studying various dragonflies, snails, frogs and other living creatures. Or, lying on your back in the grass, you were peering into the shape of clouds running across the sky, performing a “heavenly” show that only you could understand. Unfortunately, as we get older,
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