There is a custom in our hometown, that is, during the Dragon Boat Festival, everyone will collide with each other and boil eggs. Whoever has an unbroken egg means he is lucky. On the first day after the Dragon Boat Festival, children brought eggs to bump into me. As a result, my eggs broke the eggs brought by most children. At this time, Yiyi raised a question: "Teacher, why can your eggs break so many of our eggs?" ? Is there anything in your egg? ""no! But I have a magic weapon to win, hidden in eggs. " "What is the magic weapon? Just tell us. "The children can't wait." Don't worry, first observe what's special about the shape of the egg. ""I found that the egg is big at one end and small at the other. "Feifei took the lead in telling the answer." Do you know whether it is easier to break someone's eggs with a big head or a small head? ""it must be a small head that is easy to break. "Most children agree with this statement." Is it true?/You don't say. Let's touch the eggs again. "I asked a child to touch the big head of my egg with the small head of my egg." Bang! "The eggshell in my hand cracked a big hole." Ah! How did this happen? "The children are puzzled. So, with the children watching, I slowly peeled off the eggshell in my hand. The children shouted like discovering a new continent: "There is a small pit in the big end of the egg, but there is no pit in the small head, so the small head is stronger." "The children finally understood the truth, and they played happily again, but after a while, several children raised questions:" We all hit each other with the small heads of eggs, and some eggshells were broken and some eggshells were not. Why is this? " I asked the children, "What do you think is the reason? "A child immediately said that it was because the eggshell was thick and thin. Why are eggshells thick and thin? The children talked again: the thickness of eggshell is related to the hen's food; It is related to the fatness and size of hens; It is related to the season when hens lay eggs; This is related to the variety of hens. ...

Unexpectedly, "touching eggs" not only brought happiness to children, but also gave them some understanding of eggs and stimulated their interest in exploration.

It will be more interesting to tell them to shake eggs after learning to touch them.