What has two wheels(轮子), runs on human energy and is red, pink, blue or any other color? A bicycle.

    ①In the US, the number of people who bike (骑自行车）in and around the city has increased. More people bike to work, to the store or to go to the movies. There are more bike lanes(车道)，bike signs, bike shops and there is even a popular bike idea, Capital Bikeshare, which allows people to rent(租用) bikes to get from place to place.

    • Kids also like biking to school.

    ②"In winter we walk, and in the rest of the seasons we ride our bikes, " Olivia Steckler, 8, said. She studies in a public school in Northeast Washington.

"It makes me feel happy," she said about biking. It takes her about 15 minutes to ride from home to school.

    Olivia is one of many kids in Washington, especially in the Capitol Hill area, who bike to school with an adult.

    Malia Weedon, 8, a third grader at Maury Elementary School, likes to bike because it's faster than walking. It takes her about five minutes to get to school on her bike. She's been biking to school for several years now and likes to race her little brother, William,

    Jennifer Hefferan, whose job is to make sure kids in Washington get to school safely, said that more people are calling her to ask about bike safety for kids. She also said that schools ask for more bike racks (自行车停放架）almost every day.

    There are many magic（神奇的) things in the world of animals. Please look at the followings：

    People usually hate mice, but one mouse wins the hearts of the people all over the world—the famous Mickey Mouse.

    Fifty years ago, most films had no sounds. A man named Walt Disney made a cartoon mouse that could talk in these films. He named his mouse Mickey Mouse. Soon Mickey Mouse became a good friend of both young and old people. Children like to see their lovely friend, because he brought happiness to them.

    Mickey is a clean mouse right from the beginning. Perhaps this is why people love Mickey Mouse. In his early life Mickey made some mistakes. People were very angry. They wrote to Disney and said that they didn't want Mickey to do wrong things. As there were many things that Mickey could not do, Disney made a new animal named Donald Duck. He also made a dog, Pluto. This dog does foolish things and makes mistakes wherever he goes. Now our Mickey Mouse is not only clean, but more interesting. He came out as a star of beauty and wisdom (智慧). He has his friends in almost every country.

    We usually go to see a doctor when we are ill. Doctors may give us some medicine, and the medicine often makes us feel better.

    But sometimes the doctor's medicine doesn't work. This happened to one man, Thomas Smith. He was ill in hospital, but he wasn't getting well. Then he found a new "doctor" inside himself. He saw funny films. He read funny books. And something wonderful happened. Laughing took away his pain after half a year. He could have a good night's rest. His own happy feeling helped him get well again. He wrote his story in his book. He said laughing was very useful. It was the best "medicine".

    Another man, Simon Beck, was also ill, and he had a serious pain in his back. The doctor couldn't stop it, so the man began to "picture" his pain. In his head he "drew a picture of a dog. He imagined it to be a real dog. And it was hurting him. Then the man talked softly to the dog. He put his hand on the dog's head and made friends with it. One year later, his pain went away!

    These stories may surprise you, but more and more people are getting well in this way. So call on the "doctor" inside your mind, and keep happy and well!

    Raising chickens seems a difficult task for teenagers. Grace Goodpasture from Virginia, US, not only raises them but also tries to breed（喂养） the "perfect chicken". And she even won an award for her love of science.

    Grace started breeding chickens in her third grade at Steward school. At first, she worked on some farms for her school project. But later the fourteen-year-old started to have some ideas of her own.

    "Some have thicker eggshells(蛋壳), and they are hearty(健壮的) throughout the winter," said Grace.

    Since then, the young science lover started to try to find the healthiest free-range(散养) chickens. And she ended up breeding a type that now bears her name.

    The National Science Teachers Association (NSTA) gave the 2015 Angela Award to Grace Goodpasture. Her interests don't end with chickens and eggs. She is also into building robots and testing preservatives (防腐剂) in fast foods. In her words, she wants to go to Virginia Tech for poultry (家禽) sciences in the future.