I wonder if Mary would have used ear plugs? Probably not. Jesus was probably a baby who did a lot of cooing and looking cute. Jesus was probably a early talker too. Unfortunately GH isn't an early talker. He's probably about average. This means on a bad day 50% of what GH tries to communicate is done by stomping his feet and screeching at the top of his lungs.
I don't know who invented ear plugs. But I wouldn't be surprised if something this awesome came directly from the mind of God himself:D