Children

At that time the disciples came to Jesus and asked, "Who is the greatest in the kingdom of heaven?" He called a child, who he put among them, and said, "Truly I tell you, unless you change and become like children, you will never enter the kingdom of heaven. Whoever becomes humble like this child is the greatest in the kingdom of heaven. Whoever welcomes one such child in my name welcomes me. If any of you put a stumbling block before one of these little ones who believe in me, it would be better for you if a great millstone were fastened around your neck and you were drowned in the depth of the sea."

That is GS #2 above.