Answer me this, when the Lord was speaking, did he literally say kingdom of heaven or kingdom of God? Did Matthew hear one thing and Luke heard another? Or...through the Holy Spirit, were they lead to write exactly what they wrote each for a specific reason?
Mat 19:14 But Jesus said, Suffer little children, and forbid them not, to come unto me: for of such is the kingdom of heaven.
Luk 18:16 But Jesus called them unto him, and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God.