Do boys who are close in age always play aggressively? I babysit two boys, aged 4 and almost 6, and several times throughout the day I'm having to put the older one on timeout for hurting his younger brother. I have a going rule of keep your hands and feet and body to yourself because I don't want anyone getting hurt, but he just doesn't listen and it's frustrating. I have my own 18 month old son and another on the way, I don't want him learning this behaviour. The mom doesn't seem bothered by it and says they just play roughly. She seemed more annoyed that I out her son on timeouts for it than being supportive of my rules.