If a boy becomes a Muslim and then dies, should a funeral prayer be offered for him? Should Islam be explained to a boy?

وَقَالَ الْحَسَنُ وَشُرَيْحٌ وَإِبْرَاهِيمُ وَقَتَادَةُ إِذَا أَسْلَمَ أَحَدُهُمَا فَالْوَلَدُ مَعَ الْمُسْلِمِ. وَكَانَ ابْنُ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا مَعَ أُمِّهِ مِنَ الْمُسْتَضْعَفِينَ، وَلَمْ يَكُنْ مَعَ أَبِيهِ عَلَى دِينِ قَوْمِهِ. وَقَالَ الإِسْلاَمُ يَعْلُو وَلاَ يُعْلَى.And Al-Hasan, Shuraih, Ibrahim, and Qatada said, “If one of the parents of the boy becomes a Muslim, then the boy will be with the Muslim parent.” And Ibn ‘Abbas رضي الله عنهما was with his mother who was amongst the weak and the poor people, and was not with his father who was on the religion of his nation. And said, “Islam is always superior and never inferior.”