Love to sink into your chairs and relax when you get to school. Then you will not be happy to hear that schools all over the world are seriously considering exchanging traditional desks for ones with no seats at all — Yes, that means you will be encouraged to stand through those already too long math and science lessons! Why would anyone even think of putting kids to such cruelty. Experts say it improves their health and helps fight obesity. While that may seem a little far-fetched (牵强的), the officials at the few schools around the world seem to agree.

    Among them are educators from the College Station Independent School District in Texas, who recently completed a week-long experiment involving 480 students across three elementary schools. The 374 kids that agreed to participate in the study were provided a device that helped record step count and calorie consumption over the entire period.

    All 25 teachers involved in the study reported that students appeared to be more alert and concentrate better, when allowed to stand. The one thing that did surprise the researchers was that younger kids were more willing to stay standing than kids in higher grades. They believe this may have something to do with the fact that after years of being asked to “sit still”, older kids have a harder time adjusting to this unexpected freedom.

    American schools are not the only ones reporting success with stand-up desks. Four schools in Perth, Australia, which have been testing them since October 2013, have seen similar results. In May 2014, Grove House Primary School in West Yorkshire, became Europe's first test one, with a seven-week trial that involved the use of desks made by Ergotron in their fifth-grade classrooms. While official results are not out yet, early reactions from both teachers and students, have been extremely encouraging.

    The findings of these studies and others done previously, all seem to mean that allowing kids to move around in classrooms is a win-win for students and teachers — it helps kids get healthier and provides educators with a more attentive audience.

    Philadelphia offers a ton of attractions that are suitable for people of every age and here are some family—friendly attractions．

    Spruce Street Harbor Park

    Spruce Street Harbor Park，one of the best urban beaches in American，is an outdoor heaven on the Delaware River waterfront．Visitors can relax in a hammock，play on the playgrounds，and play games like table tennis and giant chess．Don't miss out on the park at night，when colorful LED lights hanging from treetops make the entire area bright.

    Blue Cross RiverRink

    Offering ice skating in the winter and roller skating in the summer，Blue Cross RiverRink creates a fun，outdoor experience for the whole family．Visitors can play on the nine-hole mini-golf course during the summer，and enjoy eats and drinks from the on-site(现场的)bar and restaurant all year round．

    Sesame Place

    Big Bird，Elmo and the other stars of Sesame Street come out and play at Sesame Place，the only theme park in the nation starring the popular TV show's most lovable characters．A water park，interactive activities，parades，fireworks and shows add to the fun．

    Once Upon a Nation Storytelling Benches

    On summer days，uniformed and professional storytellers at 13 storytelling benches throughout Philadelphia's Historic District entertain visitors with true，free，three-to-five minute tales about the colonial(殖民的)era as part of Once Upon a Nation．Children can pick up a Story Flag at any storytelling bench，and then collect a star from every storyteller on their journeys．Flags with all the stars can get free rides on the Parx Liberty Carousel at Franklin Square．

    My daughter Kelly is a cautious person. She needs to warm up to situations, and is hesitant to try new things. When with close friends, she becomes a leader who laughs loudly and chants, "Girls rule, boys drool." But when that comfort zone is not around her, she is shy and nervous.

    This has been challenging for me at times. "Shy" is not a word that I think has ever been used to describe me. But this has been a year of firsts for my girl that has filled her with a new sense of confidence. This year she moved to lap lane in swimming where she was preparing for a swim team. This year she learned to ride a bike without training wheels. And this year she completed her first kids' triathlon(三项全能).

    On Saturday, with a thunderstorm coming soon and my son's birthday party later in the day, we all went out in the dark of the morning for Kelly to participate in her first triathlon. We practiced transitions from swim to bike to run with her, we got all the equipment she'd need, and we kept talking about the race. But as we waited the two hours for the older kids to finish before her turn, she held my leg a little harder and told me she loved me a few too many times. She was nervous but trying to keep it together.

    And then it was her turn. From the second she jumped into the water, my heart soared. My daughter transformed into the most confident human being I had ever seen. She dominated that swim, crushed that bike ride and ran to the finish with the biggest smile on her face.

    I can honestly say that I never felt so proud of someone in my entire life. It wasn't because she did a sport or anything like that. It was because she was afraid of something and conquered that fear with confidence and a fire I hadn't seen before.

    All day I would find myself just looking over at her and smiling. She might be wearing the finalist medal but I felt like I won that day. I won the chance to see my girl shine.

    Shine on, sweet baby.

    Confident, smart and high-tech, they're followers of pop culture and know what social networking is all about. They're tweens, children between the ages of 10 and 12. These young people are no longer little kids but they are not yet teenagers, because tweens are in a state of transition (转变).

    The tween years are hard for children. From a social point of view, tweens are dealing with quite a lot. They have to face changing relationships, middle school and a whole lot of pressure (压力) to succeed and fit in. They may become angry over seemingly small things. A bad test grade, an argument with a friend, a bad day on the ball field, or a request to clean a bedroom might set them off.

    Elizabeth Hartley-Brewer, a parenting expert in London and author of Talking to Tweens, says, "The tween years are when young people begin to realize the wider world and to see themselves as separate from their families."

    Right now, tweens' friends are everything to them. It's universal for the age, but they show it in different ways. For boys, the whole friendship thing is through technology and sports. Girls like to talk.

    Tweens are also a hot market. What do tweens consider cool? Music is at the top of the cool list, followed by going to the movies. "Being smart" comes third, tied with video games, followed by electronics, sports, fashion and protecting the environment, according to a report.

    Undoubtedly, tweens have great spending power in the United States. It was the tween market that made Justin Bieber and Harry Potter household names. Retailers(零售商) know tweens are a hot market for clothes, music and entertainment. Tweens have their own sense of fashion and enjoy their own parts of popular culture.

    When Rebecca Saxon was diagnosed with cancer at the young age of 27, she thought her life was over. But in her darkest hour, inspiration struck and she found a way of turning her misfortune into advantage.

    Following her cancer treatment, Rebecca launched a successful business "Something Blue Bridal Shoes"—a unique range of wedding footwear, which came out of the fashion pictures she drew while recovering in her hospital bed.

    Rebecca, from London, says, "I started designing wedding shoes with blue soles (鞋底) when I was halfway through my cancer treatment. I had a hit when I was diagnosed with cancer but I decided that I was going to pick myself up and fight this cancer. The pictures were my release and the way I got through the many hours spent in a hospital room. I had no idea what was going to happen to me, but I knew I had to be positive if I was going to overcome this treatment. I told myself this was not going to be the end for me. I decided to fight with my negative feelings and start drawing."

    Rebecca had always loved fashion since she was younger. Several of her friends were getting married at the time when she was ill. "So at first, I would be drawing designs for wedding dresses and other clothes. But then I started drawing wedding footwear—designing shoes with blue soles which were very comfortable too. I thought it would be a lovely way of combining the 'something old, something new, something borrowed, something blue' tradition. Drawing really helped me deal with my treatment," said the brave girl.

    With the encouragement of her boyfriend, she turned her dreams into her reality and set up "Something Blue Bridal Shoes". Each beautiful shoe has a blue sole, combining the age-old tradition of what a bride should wear at her wedding for good luck.

    If American waterways had ever been voted on the yearbook, the Buffalo River could easily have been named Ugliest. It could be hard to find hope there. It took decades for public perception of the river to shift. But activist citizens, who collaborated with industry, government, and environment groups never gave up on their polluted river—the Buffalo River gradually went from being considered a lost cause to a place worth fighting for. And by now the cleaned—up water is one of Buffalo'S biggest attractions.

    By the 1960s, the river was seen as one of the worst sources of pollution pouring into the Great Lakes. The Buffalo River had caught fire many times. The surface had an oily layer, and any fish caught there were not eatable.

    The waterway's fate started shifting in the mid-1960s. Stanley Spisiak was a local Polish—American jeweler by day, but by evening he was the kind of guy who'd chase down dumpers(垃圾车)he spotted on the Buffalo River. By 1966 he found himself winning the National Wildlife Federation's "Water Conservationist of the Year" award. And before long he got a nickname:" Mr. Buffalo River. "But there was only so much he could do—the river was still declared biologically dead in 1969.

    Jill Spisiak Jedlicka is his great-grandniece. She picks up where he left off by directing the river's protector organization, Buffalo Niagara Waterkeeper. Professor Schneekloth and seven friends founded the organization as an all-volunteer nonprofit in 1989, after organizing the first river cleanup that year. Today the group employs 27 full-time workers and has helped oversee the Buffalo River's $100 million restoration.

    So far, the Buffalo River's water quality has restored, but it is still an ongoing issue, as sewage(污水)can overflow into the river after storms. Habitat restoration continues as well; fish and plantings are still being sampled to measure how well it's gone.