First u can address all the people who are gathered there, and then, start with what is a sport.
Sports and games are just to make your body physically fit. They enrich our mind.
Playing games in computer will drain you. But, playing games in real, will give you a fresh mind, and gives u better attitude towards every things. The games will not alone keeps ur body fit, but, it also keeps you healthy. Healthy person leads the world. So, it is the sports and games which makes one to lead a happy life.
Then, thank one and all who are gathered there.
Hope this will help you.