Robots don’t expect any thanks for all the work they do for us. After all, they don’t have feelings. But that may be changing with Nexi, a robot created by scientists at the Massachusetts Institute of Technology. Nexi can move its face to show anger, happiness, or sadness. It can also raise its eyebrows to show surprise.

How would you like a robot to help clean up your toys, or one that plays hide-and-seek with you? Nao can be programmed to do both those activities, and more. A two- foot-tall robot, Nao was designed by a company in France to be a helper and companion. It can talk, walk and even remember faces, voices, and places. Also, it can be programmed to assist with daily tasks, such as checking e-mails.

Need a lift out of bed? RIBA, short for “Robot for Interactive Body Assistance”, will lend its helpful arms! Some patients at hospitals and nursing homes have a hard time getting in and out of bed. RIBA can gently lift a patient out of bed and help him or her into a wheelchair. The robot can safely pick up and carry people weighing 135 pounds.

Robots that work in water—and look like familiar sea creatures—are making news lately. One of them is a robotic fish. Researchers built the robo-fish to swim in water to detect pollution. There’s even a robotic penguin called the AP, which uses flippers(鱼鳍) to paddle and can move in all directions.

This website is all about looking after the Earth. There are facts about different animals, as well as information about forests, deserts and oceans: You can upload your own videos onto the site for everyone to see.

This is one of the best sites on the web for teenagers who love writing. You can share your work with others, and there are message boards where you can chat about things that are important to you.

On this site you can watch a daily news program and search for information about big news stories. There are also videos on different subjects, articles about famous bands, games and competitions.

Finding out about your favorite writers is easy on this site. There are lots of interesting articles and information about the latest books. You can read blogs by well-known writers and post questions to them. And you are likely to get replies from them.

There are millions of songs on this website for you to download or listen to online. You can save your favorite songs in your own list. If you’re in a band, you can record your music and upload it. The website is large, but the menus are easy to use.

There’s lots of information on this site about maths, chemistry and biology. You can visit some of the world’s most famous museums, or watch wildlife via webcams. There are also some very cool games, such as Save the Planet.