They way I do Hearing aids on my sims is if they get them on their everyday outfits on age up then roll a number between 1 and 100. 50 and below they get hearing aids for their entire life and above they don't. The exceptions are certain occults like ghosts, Vampires or any occult that are undead. He's cute as well and I can see he is wearing a batuu outfit :)
Interesting concept you have. My thoughts about his tantrum over the loud music, is that perhaps, since my game is set somewhere in the 23rd century, is that in his toddlerhood he was deemed old enough for a highly specialized, but risky, bit of surgery to reverse the defect. That he is just home from the hospital, and since he was only used to feeling the music, not hearing it, he is understandably upset at the pain in his wee ears. Not sure, though, if I'll run with this plot.
I do like that plot. Up to you though how it will go :)
