According to Webster's Dictionary, being an adult is defined as a man or woman who is fully grown or a mature person having reached full size and strength. Being a juvenile is defined as young and youthful but not yet an adult or, for slang purposes, a kid.
The only problem I see with the definition is that lots of kids act more like adults than adults themselves. The majority of adults do a very good job of being adults, thank goodness. However, and unfortunately for the rest of us, there are quite a few adults who behave more like kids than adults.
We preach to our children about sportsmanship, being a team player, manners, courtesy, respect, common sense, leadership and doing the right thing despite being popular. As adults we have to do all we can to teach our children how to become good adults. Our children don't need to witness adults behaving like children. When I say children, I'm not talking about an adult being silly and having fun. Acting like a kid and being a kid are totally different than being an adult and acting childish and selfish. You know, the old, "If I can't win I'll take my ball and go home" thing.
Some adults refuse to do right because their enemy might be right and win. Our society can't afford people knowing how to do right but refusing to do so because of winning and losing. We all lose when we play those games. As a nation, state, county and city, we must strive each and every day at being a team. We have enough enemies outside our great nation that would like nothing more than to see us destroy ourselves.
In closing, I am making a plea to all adults to please lead by example for our children's sake.