Nowadays, the pain of the back of every other person is troubling. This is mainly due to the fact that few can properly stand or sit. It also applies to young children who cannot properly hold their bodies. Then, of course, these problems continue until adulthood. The solution is to expel children out to play with friends.
Nowadays full of computers, tablets, Xboxes, smartphones, etc. Children often spend most of their free time sitting up and playing different games. They sit all day, morning at school, and when they come home, they sit down again. It is not definitely good for them, but neither for their backs. So get them out and take them out yourself, or get them out playing with your friends. They may not be very happy, but their body will surely thank you.