hi.i  am   glad  to  help  you  with  Chinese.and  you can  help  me  with  some  English  questions.

静心怡神Calm down and refresh oneself
神怡心静Happy and calm

（符合的年龄对孩子们开始用手机是什么？孩子应该在什么符合的年龄用手机？）
现在连八九岁的孩子们都有了手机，（甚至比他们更小的孩子也开始用手机甚至比较年轻孩子用手机。）我看过一个调查报告表示：九岁就有手机的孩子普遍考试成绩比较低。
用手机对于孩子们来说有很多坏处，比如说手机会更容易使孩子们分心，而网络中又有许多危害孩子们的信息。
虽然手机有那么严重的缺点，但是现在还是有很多父母买手机给孩子。在中学为了增加学生交流，手机就是不得不有的。因此父母恐怕孩子没有朋友， 被追求流行时尚的孩子瞧不起，而使大部分学生十二岁就有了手机。
不过，在有些专业心理医生看来，实际上并不是这样的。其实，没有手机的孩子们也可以拥有友谊，也许他更是真正的朋友。
对你来说-孩子应该应该在什么符合的年龄用手机？
作文的目的是为了练习使用关于-符合

What is a suitable age for children to have a Mobile phone?
Nowadays even 8-9 year-old children have a mobile phone. Even younger children use phones. I read a report that said nine-year-olds with a phones exam marks were lower.
There are a lot of disadvantages of mobile phones for children. They can distract in school. Also there are a lot of dangers on internet.
Despite these serious problems many parents buy their children mobile phones. In order to participate in the social life of secondary schools a mobile phone is essential. Therefore parents are afraid a child without a phone won’t have friends, and the result will be that he/she isn’t a popular student. For this reason today 12 year old students already have a mobile phone.
However some child psychologists say this is not true. Really students without phones also make friends. Maybe even more real friends.
In your opinion what is the correct age to buy children a Mobile phone?

they are different. like 爱(i love my family.)you can love your friends ,your boyfriend or a girlfriend. like 恋爱（they have been dating for four years or they been in love for four years）you can failing your love. i am so sorry my English is bad.

i can  help  you  with  Chinese.