Nowadays, with the unprecedented development of the Internet, more and more children get access to networks using their smartphones, some of the kids even spend many hours on them every day. However, most of the time, it is not the children's problem that makes them so addictive to smartphones. Actually, most of the youngsters who often play with their smartphones have their parents too busy to spend time with them, they have no choice but to use smartphones for fun. In addition, most of the games and apps on the phone are always designed to make people get addicted to them, even adults may fall in love with them and spend lots of time on them. Undeniably, the development of kids spending too much time on smartphones is negative and should be aware by more people.