On one side of the spectrum Christianity is about adults who are called to yield to their eternal savior, the Lord Jesus Christ. On the other side of the spectrum are children whom Jesus wanted brought to Him.
"People were bringing little children to Jesus for him to place his hands on them, but the disciples rebuked them. When Jesus saw this, he was indignant. He said to them, “Let the little children come to me, and do not hinder them, for the kingdom of God belongs to such as these. Truly I tell you, anyone who will not receive the kingdom of God like a little child will never enter it.” And he took the children in his arms, placed his hands on them and blessed them." (Mark 10:13-16, NIV)
"Taking a child, He set him before them, and taking him in His arms, He said to them, "Whoever receives one child like this in My name receives Me; and whoever receives Me does not receive Me, but Him who sent Me." (Mark 9:36-37, NIV)
“See that you do not despise one of these little ones. For I tell you that their angels in heaven always see the face of my Father in heaven." (Matthew 18:10, NIV)
"In the same way your Father in heaven is not willing that any of these little ones should perish." (Matthew 18:14, NIV)