Admittedly, when I was young, I thought Cinco de Mayo was the person who freed Mexico. Every May 5, I think about that, and have a good laugh at myself.
I saw instructions on how to make Pull-Open Pinatas in Family Fun magazine, and think they're a great little Cinco de Mayo treat, not to mention something kids would love at a birthday party.
So get those tacos cooking, margaritas chilling and whip up some of these for your party guests.