Birthdays are celebrated（庆祝）all over the world. Some ways to celebrate birthdays are rather similar from county to country：candles，cakes，and birthday wishes. But there are also different ways to celebrate birthdays. Here are a few：

    Chinese young people love their smart phones．They play with phone apps every day．But now, a book has let them forget about their phones．The book is called Secret Garden．

    It is a colouring book for adults'．You don't have to read it, because it has almost no words．All the pages are pictures but no colours．You just need to use colour pens to paint it．An artist in Britain made the book．

    The book is now the biggest selling book on amazon．Cn．last month, it sold 25,000 copies in China．Many young people bought this book．They like it so much that they stop playing games or surfing the Internet on their phones．These people are mainly young mothers and workers．It is very difficult to take care of babies or do a good job at first, so they feel a lot of pressure．Drawing the book can help them become less nervous．

    In the past, people thought colouring books are only for children．With Secret Garden getting more and more popular, many young adults also begin to paint as a hobby．

    In many English homes people eat four meals a day: breakfast, lunch, tea and dinner. People have breakfast at any time from seven to nine in the morning. They eat porridge，eggs or bread. English people drink tea or coffee at breakfast. Lunch comes at one o'clock. Afternoon tea is from four to five in the afternoon and dinner is about half past seven. First they have soups, and then they have meat or fish with vegetables. After that they eat some other things, like bananas，apples or oranges. But not all English people eat like that. Some of them have their dinner in the middle of the day. Their meals are breakfast, dinner, tea and supper and all these meals are very necessary.

    Outside, it's a cold winter's day. Inside a large shopping center, people are hanging around. But then, without warning, a pop song starts to play loudly. A teenager boy walks lazily to the center of the open space, and dances crazily to the music. He's joined by two of his friends, then some of the old people. In a few seconds，more than sixty people are dancing to the music—all in time and all in step. At first, onlookers(旁观者)are puzzeled, and then they start smiling and clapping. They now know what they're seeing: a flash mob(快闪).

    According to Wikipedia, the term "flash mob" was created by Bill Wasik, an editor at Harper's Magazine, in 2003. In a year, the phrase had entered the Concise Oxford English Dictionary. Since then, hundreds—possibly thousands—of flash mobs have been performed around the world, in almost every kind of public space imaginable!

    Each flash mob has its own style，but most flash mobs follow a similar formula(方案). Often, the organizers search for willing participants(参与者)using social media. Instructions and dance moves are given through the Internet. There are usually several rehearsals(排练)before the big day.

    While it's happening, a few lucky passers-by watch it live. Most people who watch it, however, will see it later online. Some of the most popular flash mobs on YouTube have been watched more than 10 million times. A famous example is MP3 Experiment Eight, a flash mob that took place in New York City in July 2011 with over 3,500 participants. This event was different from normal flash mobs in that much of it was completely silent—and there were no rehearsals.

    Flash mobs provide the participants, onlookers and online viewers with a lot of enjoyment and pleasure. For this reason alone, they're a modern, popular art form that should be celebrated.