I love kids' first Halloween when they finally figure out what is going on. But, be careful. He may be asking to go trick'or treating every night now for the next week.
I won't be surprised if he does Mike! It was awesome seeing him look for pumpkins and correlating that with candy.
Posts over 14 days old have their comments held in moderation - I've been getting an unusual amount of spam for a guy who paints trilobites. I'll release it lickety-split though.