Some people brought their children to Jesus so that he could bless them by p lacing his hands on them.  But his disciples told the people to stop bothering him. When Jesus saw this, he became angry and said “Let the children come to me!  Don’t try to stop them. People who are like these little children belong to the kingdom of God.  I promise you that you cannot get into God’s kingdom unless you accept it the way a child does.”  Then Jesus took the children in his arms and blessed them.

I think Jesus is saying that we must accept Jesus with the faith and trust that a child would have for their father, no doubts and no reservations.