Who should be on the penny?

Funny story between Parker and me on the way to school! Parker found a penny on the floorboard and looked at it and we were talking about "In God We Trust" being on the front.
Parker said "They should have put a picture of God on the penny".
Mom said "We don't know what God looks like honey".
Parker said in a complete straight face and seriously "Oh right, but they didn't know what Abraham Lincoln looked like either!"
Mom said "Yes they did, they had picture of him"
Parker said laughing "oh!"