Children Using Smartphone

I going to write about people using Smartphones. Now more and more people are using Smartphone such as Blackberry, iphones and Android. First, a few years ago Smartphones were being used by businesspeople, now they are being used by all ages. I am going to focus on children around 7 and 10 using Smartphones. Sometimes when I take a walk, or I am in the bus or train, I see children using Blackberry or iphone, but they really need them?? I think they don't need to use all the functions that the Smartphones have. As I said before, they are needed most of all for business people. they were make for them. It sometimes frustrates me to see children using Smartphone because they don't  need them. Also I got my first cellphone  when I was 13 or 14, but was an old one that now it's obsolete. However, for some, it's more of a fashion to have a Smartphone. another thing is that parents should think before they buy their children a Smartphone because I think they are wasting their money. they spend all the time using their Smartphone. Now when they play, they play all day with their phones. Maybe in 20 years or 15 children won't play in the outside world.
It's hard to justify Smartphone. For many people there are some good things about them; parents can say that they can track their child to make sure that they are safe, and they know were they are, But in my opinion children shouldn't use Smartphone.