3-8-10-12 rule In my opinion, I would totally agree with that. We should limit the time, to control the children under 12 not to be addicted to social media or internet. Nowadays many parents hire technological babysitter to look after their children. This is to say, they play video on tablet and let their children watch this technological device all day. Then again, it's not health for childhood. For instance, after playing video games or watching films long time, it's hard to focus on static activity, such as reading books or chatting with friends face to face. Because their concentration are already damaged. Moreover, accompanied usage of the internet is as well as necessary. We can find various information over internet. Yet, the children can not judge what kind of information, which they indeed need or are harmless. In order to avoid this situation at all costs, therefore parents play the important role to teach their children by accompany. Above all, it seems to be better, if the children do not start early to use technological devices.