Has it been determined that J does have learning disabilities? I went back and reread the OP and I guess that's what is striking me as a possibly embarrassing issue, if he hasn't been assessed for it yet, or they hadn't thought of testing him yet. Not that there's anything wrong with it (I have ADD and middle son has ADHD) but some kids might get embarrassed if everyone knows that learning is more difficult for them than anyone else.
J has had all the tests and assessments. His eyes and ears are fine. He doesn't have any LD's as such he is just struggling with literacy an numeracy for his age. Not totally uncommon in boys. He just needs a lot of support t get him up to a functional level. I won't mention the reasons for this as they are complex and last time my views on the matter did not go down well at all.
He is quiet and sensitive kid. Very socially aware and is popular at school with his peers, just not academically inclined. That is fine. Not everyone can be and it is not the be all and end all. He didn't look happy when the subject was mentioned and he wandered out of view so I don't know if he was still in the room but it seemed clear (to me anyway) he was trying to disengage from the conversation.
One of the reasons I refused to read out the information was it was not well worded. It was not from the child users point of view as in making learning fun, more along the lines of saying if your child is failing in some way they need one of these gadgets. The tone and the message were just off.
I am pretty sure my brother's discussions with mum on the matter were intended to be private and not a matter for open discussion, which is why it really threw me she would bring it up in front of J. She may well have thought 'Oh young boys like gadgets and here is a gadget that I have found for him that will help' That is fine, but there seemed to be no thought to his feelings and now my brother is stuck having to explain he has been talking about his problems at school with other people. Even if the are his grandparents.