You can register your family to a McD account and your kids below 12 get free meal coupons for birthdays. Someone I know maintains 4 imaginary kids to his family account and collects 4 free meals a year. :)
For anyone unfamiliar:
I remember when I moved to a new apartment once, two of my friends told me how to get free meals. Every time they moved they wrote several restaurants about their terrible experience, how their staff was unprofessional and how they were embarrassed brining their relatives there. They'd get like 15 free meal vouchers for Chili's, O'Charlies, Red Lobster, etc.
Seems like such an obvious scam there must be some reason it can't work.