Robotics is usefull for everyday activitys, though people may not think about it, when ever they are able to use there car, its because of robotics, new cars use many things in them that use robotics. It can be used for solving many problems, or having fun. Lego's is a good example for a fun way of robotics, they are also a good starting point for anyone trying to get into robotics but doesnt know much about it. There are many video's that will help you with your ideas and give you ideas. So if you are trying to start at the basics of robotics then lego mindstorm is a good place to start.