I'm the oldest child, I'm 18.
I have two brothers and one sister, the oldest of my two brothers is 15, turning 16 in one month. He has a very prideful attitude and will never admit to being wrong.
Although most of the time we get along quite well.
My second brother is 9, he can be a yap, but I try to keep him right, by teaching him proper manners and other useful skills, I'm also teaching him good manners in online games.
My sister is 13 and personally, I can't stand her. She is selfish, arrogant and a complete *****, not to mention, she can be a bit slow.