Is this a good thing?

Well I have attempted to start an allowance - I figured it would be a good way to teach about money, tithing, chores to earn extra money, etc. So far so good especially with Benjamin he is actually trying to save his money for a legos spiderman set - about $11 which seems like a million to him right now. But anyway to my point, yesterday I was teaching him how to make a wish when blowing a stray eyelash off your finger and he very seriously closed his eyes and said I wish foooorrrrrr..... MONEY. It made me a little sad - so materialistic already? I suppose its inevitable though.