Both sons are prodicals what God is
teaching us through the parable is revealing the intents of our hearts there sinful.The younger son wanted the worldly pleasures that was where his heart was at at least he is honest.The older brothers heart was no better because it was all
about him it wasnt out of love for his father that he stayed on the farm but that by his works he would gain all that his father had.If he loved his father he would have known how his father would have responded to his brother and he himself would also have been happy to have seen his brother alive again.In the back of his mind he is worried that he may lose more of his
inheritance and feels threatened and that is why he responds in the way he does.His heart hasnt changed at all even though his brother has come back from the dead.
So when six Gentoo penguins show up at his door as his
inheritance from his deceased father, they
teach him
about life, love, and getting your priorities straight.