Mark 10:14 - 15
ESV - 14 But when Jesus saw it, he was indignant and said to them, "Let the children come to me; do not hinder them, for to such belongs the kingdom of God. 15 Truly, I say to you, whoever does not receive the kingdom of God like a child shall not enter it.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.