Who's gonna say the blessing?

Our rule at our table was, if you took a bite of your food before we prayed, then you are the designated prayer person for the evening. Well, this no longer works...My kids RUN to the table to see who can eat the first bite so they can pray. Since I only have 2 children, our new rule is they can both say a blessing for dinner. If they are fighting over who prays, let them both pray!