THINKING OUT LOUD. Sharpener for pencil. Two days ago my older son found sharpener for pencil at home. He is 4 years and he never seen it before. I told him that it needs in order to sharpen a pencil. I showed how to do it. Sharpener closed kind. So my son did not see the whole process. Next two days my son asked me a sharpener. He sharpened already sharp pencils again and again. I did not see any point in it, but I allowed to do it.. Today he sharpened pencils too. And suddenly he explained: "Pencil became small!" "Yes" - I said. And at the moment I understood that he made real discovery for yourself. "Why?" - his interest grew. I opened sharpener and showed how there is a process. Such "a useless" thing became very important and necessary for development.