Aisha said, "While the Ethiopians were playing with their small spears, Messenger of Allah ﷺ screened me behind him and I watched (that display) and kept on watching till I left on my own." So you may estimate of what age a little girl may listen to amusement.
كَانَ الْحَبَشُ يَلْعَبُونَ بِحِرَابِهِمْ فَسَتَرَنِي رَسُولُ اللَّهِ ﷺ وَأَنَا أَنْظُرُ فَمَا زِلْتُ أَنْظُرُ حَتَّى كُنْتُ أَنَا أَنْصَرِفُ فَاقْدُرُوا قَدْرَ الْجَارِيَةِ الْحَدِيثَةِ السِّنِّ تَسْمَعُ اللَّهْوَ