I am new to the forum so I just stumbled across your post. I’m a mother of one at the moment and she is one so I’m not yet in your shoes. Anyway, I remember being a young kid at mass, I used to hug my moms arm during the readings. I don’t think I really paid much attention, the whole posture thing rings some big bells with me, I also was taught really well and “knew exactly what was going on” or so I thought. I think teaching your child what is happening during the Mass might help to make him a bit more pious, or not, but you can always try. He is at an age where it might be boring but if you were to let him in on some of the mysticism happening during the Mass he might become a bit more interested and a bit more pious. Again, I’m not in your shoes my baby is still a baby.
Anyway, I don’t know how much I would expect but I think kids should understand the True Presence and it might help if they are taught that.
Peace in Christ,