Jesus loved Children and in Mark 10:13-16 we can surely see that:
13 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. 15 Truly I tell you, anyone who will not receive the kingdom of God like a little child will never enter it." 16 And he took the children in his arms, placed his hands on them and blessed them.
Life in Christ is committed to train our Kingdom Kids as per the Scriptures.
Sunday School is for the two age group from 4 to 6 years and 7 to 13 years.