Child
A child is a young boy or girl in the care of parents, older than a suckling or an infant, but not yet an adolescent. "Children" are sometimes used as a name for a large group of descendants of one person, such as the Children of Israel, or even all human beings as the Children of Men. A child represents innocence and charity, where innocence is the willingness to be led, and charity is love. This is why Jesus blessed them and suggested that we all become like children in order to enter heaven.
Jeremiah 6:6-7
6
For Yahweh of Armies said, "Cut down trees, and cast up a mound against Jerusalem: this is the city to be visited; she is wholly oppression in the midst of her.
7
As a well casts forth its waters, so she casts forth her wickedness: violence and destruction is heard in her; before me continually is sickness and wounds.
