Interesting small study (n = 63) on children prefering the food when it is wrapped in a McDonald’s wrapper over identical food that is not.

http://www.healthday.com/Article.asp?AID=607093

My parents had a pretty clever solution to my McDonald’s craving when I was younger.  They knew I just wanted the fryguy toys or whatever else came in a happy meal, so they said I could order whatever I wanted but I couldn’t keep the toys.  That usually put an end to my desire pretty quickly.

-Jon