'Little Children' in the Bible

But to what shall I compare to this generation? It is like little children sitting in the markets and calling to their playmates,

and said, Truly I say to you, Unless you are converted and become as little children, you shall not enter into the kingdom of Heaven.

Then little children were brought to Him, that He should put His hands on them and pray. And the disciples rebuked them.

But Jesus said, Allow the little children to come to Me, and do not forbid them; for of such is the kingdom of Heaven.