The Holy Guardian Angels, pray for us.
Jesus was saying that in a child we see the characteristics that should mark the woman or man of the Kingdom. There are many lovely characteristics in a child; the power to wonder, the power to forgive and forget, innocence, simplicity, sincerity. All these things may have been in the mind of Jesus, but there are three great qualities that make the child the symbol of those who are citizens of the kingdom namely, humility, dependence, and trust. Maybe we should be learning from the children.