Jesus invites the little children to come to Him. Tells us that the kingdom of God belongs to them. Proverbs tells us to train our children in the way they should go. That way is the way that leads to Jesus. So, where should children be? In worship, with their parents, following their example, following their lead, where Jesus and His Word and Sacraments are. There is nowhere else God would rather have them be, than right there will ALL God's people.