I was stealth evangelized by a twelve year old

So, at the library the other day, I helped a younger patron, a boy I'd say was twelve or so. He finished his transaction, efficiently and politely (which is more than I can say for some adults I deal with, certainly), adjusted his HUGE backpack, and rested his hand on the counter briefly. Then he looked at me and said "That's for you" and left.

I looked at the counter, and thought "did that kid just give me ten dollars?", a "lol wut?" moment if ever there was one. Then I picked it up. It was a Billion Dollar Bill.

I was amused, and then confused, as I examined the item further. One of the little seals on the front says "Thou shalt not covet". Ooh, he got me. I wanted money. Then I turned it over. Apparently, I'm going to hell.