If it seems that a child has a problem doing that, why not go back to basics? Help him or her to reason on such questions as: “How do I know that God exists?
وَلِمَاذَا أَشْعُرُ أَنَّ مَقَايِيسَ يَهْوَهَ هِيَ حَقًّا لِخَيْرِي ؟‏ › .‏