No doubt they long remembered the lesson! You can use common objects to build faith in God and in creation (See paragraph 10)
١٠ ،‏ ١١ ‏ (‏ أ )‏ أَيَّةُ أَمْثِلَةٍ تُسَاعِدُ ٱلْوَلَدَ أَنْ يُقَوِّيَ إِيمَانَهُ بِٱللهِ ؟‏