麻烦帮忙在这篇英语作文中改出9个错误～
One day Mr.White made a very nice models plane.All his children liked it very much and wanted to play it first.They quarreled as they could not agree with eath other.Mr.White thought hard and then he has an idea.He got his children together,said ,"This plane is only for best child.He or she never quarrels with Mother and always helps doing housework."The children looked at him sad when they heard their father`s words.Then they had an idea.The eldest brother said,"We think of it is only for you,Dad!"With the word,the children ran away.