Leonardo da Vinci was born on April 15, 1452 in Italy. He is best known as an artist today. One of his famous paintings is called Mona Lisa. However, Leonardo had many other natural abilities. He was also a great inventor. Many of his inventions have become important in modern daily life.

Although Leonardo hated war, he invented many different machines used for war. His most special invention was the machine gun, which was produced and used in war many years later.

    By watching the way birds fly, Leonardo tried to find out the secret of flying. Among his sketch (素描) we can see several objects. We consider them as modern flying machines.

    Leonardo spent many hours thinking about how to make good use of time. He developed ideas for labor-saving machines like cutting machines.

Leonardo was a strange man. He didn't eat any meat, which was very unusual in those times. He never published(发表) his ideas and scientific discoveries. He usually used mirror writing, which looks like writing in a mirror, starting from the right side of the page and moving to the left.

    We have very little of his work today. Leonardo finished only a few of his paintings. He left many unfinished because he thought they were not perfect. No one in his life time knew how great Leonardo was. We now believe, however, that he was one of the cleverest men the world has ever known.

    Mr. King was the manager of a hotel. One weekend all the hotels in the city were full because there was a large meeting. On Friday night, three men came into the hotel and asked for rooms. Mr. King said there were no rooms ready because of the meeting. The men were unhappy.

    Mr. King wanted to help them. He remembered that Room 418, a very small room, was empty. He asked them if they would share a room. The three men said they would. Mr. King said the room would be thirty dollars: ten for each one. Each man gave him the money and then went up to the room.

    Mr. King soon began to feel sorry. "Thirty dollars is a lot to ask as price for that small room. " he thought. He called his assistant over and said, "Here is five dollars. Take it to the men in Room 418. I asked too much for their room."

    The assistant took the money. While he was on the way there, he started to think, "How can three men divide five dollars? I'll give them each only one dollar and keep the two dollars for myself. The men will be happy to get something back, and Mr. King will never know. " So the assistant returned one dollar to each man.

    Each man had at first paid ten dollars. After the assistant returned them one dollar each, each had paid nine. There were three men, $ 9 ×3 = $ 27. The assistant kept $ 2. $ 27 + $ 2 = $ 29

    Where is the missing dollar?

    Do you have a vegetable garden? Have you ever watched a seed sprout(发芽) and grow fruit until it became the tomato on your plate? If you go to school in the USA, there is a good chance you have.

    At the moment, nearly 20 percent of schools in the USA have their own vegetable gardens that are planted and cared for by students. Next year, even more schools will have gardens and more USA kids will know the pleasure of growing their own food.

    Much of the growing interest in planting comes from the First Lady Michelle Obama's "Let's Move" project, which started in 2010. The First Lady wants to improve children's nutrition(营养) in the USA--and she began her project by planting a garden at the White House with the help of some local kids. The kids were more interested in eating the vegetables from their garden than in eating fast food. This gave the First Lady an idea.

    Because so many USA kids eat breakfast and lunch at school, the food should be healthy and good. Why not let kids grow the food for their own cafeterias (自助食堂)? Mrs Obama's project gives money to schools to start their own gardens, and more school gardens are sprouting up every day.

    Students also use the information from their gardens to study science and math, and they paint pictures of their gardens in art class. Many students choose to work in the garden instead of playing on the playground during their noon break. Sound like fun? Ask your teacher if there's room for a garden at your school, too.

    An old man is sitting on the sofa in his house along with his son. Just then, a crow (乌鸦) stops on their window.

    "What is that?" asks the father.

    "It is a crow." answers the son.

    "What is that?" asks the father again after a few minutes.

    "Father, I just told you. It's a crow." the son answers again.

    "What is that?" asks the old father a third time.

    "Why do you keep asking me the same question again and again?  I have told you so many times 'IT IS A CROW'!" shouts (大喊) the son.

    After a little while,  the father goes to his room and comes back with his old diary (日记). He asks his son to read one page. The son reads the following words in the diary:

    "Today my 3-year-old son is sitting with me on the sofa. When a crow is sitting in the window, he asks me 23 times what it is, and, 23 times, I answer, 'it is a crow' I hug (拥抱) him warmly every time he asks me the same question, again and again."

    When your parents get old,  do not look them as a burden (负担), but be kind to them. Remember they are the people who always love you. Love your parents, please.

    Do you want to watch movie called The Bear? Please learn more about it and experience some serious feelings.

    It tells us a story between two bears. A young baby bear loses his mother in a terrible accident, and he has to live by himself. He meets a lot of problems and lives a hard life.

    Another strong bear is run after by the hunters. They can't catch him but finally hurt him, so he can't move easily. When the baby bear meets him，he wants to become his friend. At first, the strong bear doesn't like him but finally he is touched by the young bear's kindness. So he helps the baby bear solve many problems like his fighting with a cougar(美洲狮).

    There aren't any talking animals, but the movie is funny for kids of most ages. However, we wouldn't call it a children's movie. From the exciting movie about the two bears, a cougar and the hunters, we can know that the true meaning about life is that "The greatest skill(技能) is not to kill but to let live".