Below are some suggestions given by the English children posted on the website   about how to help Africa. Which one do you think is the best? 

    A weak and slow old man went to live in his son's family. The family ate together at the table. But the old man's weak hands and bad eyesight made eating difficult. Beans fell off his spoon onto the floor. While he was taking the beans the milk was poured on the table.

    The son and his wife became angry with the old man. They said,“We must do something for Grandfather. We've had enough of his sprinkled（洒）milk, noisy eating, and food on the floor.”So they put a small table at the corner. There, Grandfather ate alone while the rest of the family were enjoying dinner. Since Grandfather had broken a dish or two, his food was served in a wooden bowl. Sometimes he had tears in his eyes as he sat alone. Still, the only words the son had for him were shouting at him when he dropped a spoon or poured food. The four- year- old grandson watched that all in silence.

    One evening, the father noticed his four- year- old son playing with some wood pieces on the floor. He asked his child,“What are you making?”The boy answered,“Oh, I'm making little bowls for you and Mum to eat your food when you get old.” Then, the for- year- old son smiled and went on with his work. When the parents heard this, they said nothing. Then tears started to show up on their faces. Though no words were spoken, they both knew what must be done.

    That evening the father and the mother took Grandfather's hands and let him go back to the family table.

As kids, we learn how to write, maybe play a musical instrument and draw. So why don’t we learn to code(编码) computer programs too? What coding has in common with writing, playing music and creating art is that it lets you bring your ideas to life. Coding is all about creativity and that’s why I love it.

Creating with code

CoderDojo helps young people around the world to learn computer programming for free. When I went to my first CoderDojo class in Dublin City University in Ireland, at age nine, I didn’t know anything about coding or even what it was. But I remember making my very first web page that first day, and being surprised that I could create such a thing. It was a great feeling that I think every young person should experience!

By going to CoderDojo every week, I learned how to make websites, apps and games. One of my apps is called Auto-Journalist. It can help journalists(记者) and interviewees do interviews even if they are both really busy or live in different time zones. It is still in development, and it first appeared at an event called Coolest Projects Awards, where young people get to show the public what they have created with code. It’s so much fun to share one’s creations, and to see what everyone else has made too.

Learning environment

For the past three years I have also been helping to teach other young people at CoderDojo DCU. In recent years I have also noticed many more girls attending CoderDojo DCU to try out coding. This has a lot to do with the CoderDojo girls’ classes—girls and young women take part in it with their friends, and it doesn’t feel like coding is a “boy thing”. It is really wonderful to see this, because we need more girls and women in STEM (Science, Technology, Engineering and Math). It’s a good way to learn more about technology.

Start early

One of the main things I have learned in the last few years is that coding is not only for adults, coding is for young people, too. And when you are a child, it is a great time to start coding, because your imagination is the limit(限制) for what you can create!

Want to learn more? Find out if there is a CoderDojo near you at www.coderdojo.com or set one up yourself! Also check out Code.org which has lots of fun drag-and-drop coding games.

Have you ever had dreams about building a robot？Or putting together a spaceship？Or even seeing your face made out of chocolate？If you have a 3-D printer，your dream will come true．

    All the users have to design an object on the computer and choose a material to print．The printers print in hundreds of different materials including glass，sugar and even skin！When the user presses“print”，the 3-D printer spreads the material layer(层)and like magic the object is produced．

    The first 3-D printer was invented in 1986 by an American．Charles Hull．But 3-D printing has only become cheap enough recently for most people to use．Designers now use 3-D printing to create unusual things．The Dutch artist Dirk Vander Kooj prints furniture made from old fridges．And doctors have used 3-D printing to print human body parts！The Telegraph reported((每日电讯报》in February that scientists from Cornell Medical College even printed a man-made ear．

    But like a lot of new technologies，if 3-D printing gets into the wrong hands，it Can be dangerous．In 2011 a group of four men in the US used 3-D printing to produce ATM skimmers(提款机盗刷器)．These were placed on an ATM and stole over $400，000 from users of the ATM．It is terrible to think that criminals like them might one day use a 3-D printer to print a gun．

    But for better or for worse，3-D printing has been put into use．In a few years，you'll probably be wondering how you could ever live without your 3-D printer！