We had fun at Almost Like Church yesterday talking about Joseph's coat of many colours. The essential point behind the kids' talk was that Joseph relished his father's favouritism at the expense of his brothers. And they resented him for it. If it weren't for the great ending of reconciliation Joseph would not be remembered positively. But the essential point was that Jesus, the favoured Son, doesn't hoard God's love but spreads it. In fact, this is the heart of the gospel: God's love for us in Christ through the Spirit brings us to the intimacy shared by (to use traditional language) Father and Son to the extent that there is nothing more to give. Jesus does not evoke envy (nor feel envious towards us) because he is not our rival (nor are we his rivals) for the Father's love. In this sense, we are all given a coat of many colours through Christ and the Spirit.
Come to think of it, there's probably a decent adult sermon in that.