Here's the sermon I gave at the First Holy Communion Mass on Sunday - or the main part of it, anyway:
During his ministry Jesus addressed himself to adults. He appealed to adult minds and consciences to place themselves under God's rule.
In the early years of the Church's life, after Jesus' resurrection, the community soon faced the situation where the adults, having themselves converted, had their children to bring up. The judgement was quickly reached that they had a duty to bring their children up as fellow-believers and fellow-disciples. Children were baptised as babies - claimed for Christ and initiated into membership of the Christian community - and their parents assumed the responsibility of teaching them the Christian faith and way of life as they got older.