One idea I have... to show the silliness of religion, our kids have started praying to the "toast monster". We pray that we wont be hit by an asteroid, or that a tsunami wont get us today (we live in Idaho). I was thinking of having them craft a toast monster god, then ceremonially eating it. While that might be fun for all the kids, I did want something, some rite of passage focused on our oldest, maybe anointing his forehead, chin and cheeks with charcoal. Dunno.
Frankly, I think that's a terrible idea, and that sound extremely childish. I'm assuming you are not serious, just frustrated.
Don't do anything. He already wants attention - just never give him anything with regard to the religion.