This was in the teacher's notes in our Bible Curriculum this morning. I've been pondering it today. Perhaps it will speak to you as well.
"God always hears our prayers, but God does not always give us exactly what we want. Just like Eve, sometimes we want something that God has forbidden or that for some reason He does not think is best for us. We believe we must have this in order to be happy. Sometimes we want this more than we want to please God. When this happens our desire has become an idol. If God always gave us everything we wanted just because we asked for it, then God would be encouraging us to be selfish. He would no longer be God, but simply a vehicle through which we get our desires met. Sometimes God does not give us what we want because He wants us to trust and obey Him even when we don't get what we want. However, we can be certain of this: God only does good to us. If God does not give us what we want, we can be sure that we do not need it to be content because God gives us what we need in every situation."
From "God's Great Covenant: A Bible Course for Children". Published by Classical Academic Press.