When building Yahoo, both graduate students in the program who are completing dissertation S3. They have not reached the age of 30 years. Yahoo originated from their hobbies when students are always challenged to find a breakthrough in facilitating the use of the internet.
From the story above we can take the conclusion that Jerry Yang and David Filo are examples of young people who have a positive hobby, and develop it seriously and finally bringing them in a row of the richest people in the world. If young children can selectively choose appropriate hobbies and activities when young, it's possible they will be successful by doing things they like.