Very cool, looks like your son getting in love with the hps concept, remind me my first encounter with headphones at age 7. My girlfriend completely destroyed 4 pairs of hps in the last year and she is always coming back to take my indestructible hps, in this rate I'll probably need to get her a pair too.
Of course he often sees me wearing headphones, but up till now he did not actually listen to them, just trying them on and getting them off again soon. But I guess I'm more relaxed with this pair than the others before, so that may come into play as well... nevertheless: a promising start ;-)
yes, a rate of 4/year is more expensive than another pair of the 8.35Ds... and it seems like a real use case for them, much like how JFB came to get his own model... don't know if the story was posted here, I read about it in noblehifi's review: