The rest of our lives we may benefit more from 'learning the hard way', in some cases, taught with certainty. But since a baby has no foundation of certainty, I believe it's best to begin with meeting those basic needs that a baby needs to have met in order to establish 'trust' ...in short, a faith that someone will meet those needs. Later there is ample time to teach them that their desires will not always be quickly met on this earth ...and they had better transfer their faith towards a future hope, where the true desires of one's heart will be clear.