There are various ways to celebrate Cinco de Mayo, which is the celebration of Mexico's independence from the French in the nineteenth century. If you are having a party at home, why not invite guests to come dressed as Mexican revolutionary war figures? You can fly the Mexican flag and match the colors with napkins, lanterns, tablecloths, and streamers. Perhaps you can find some revolution music or traditional Mexican music to play.
Traditionally, Cinco de Mayo celebrations are loud and noisy and you might want to have fireworks as well as turning the music up a notch. If you have neighbors who are likely to be less than impressed, perhaps you can give the kids sparklers rather than have fireworks. Piņatas, which are paper mache figures stuffed with candies, are much loved by kids and you can even set up piņatas for the adults to swing at too.
Serve up some delicious Mexican foods for your party guests to get them into the spirit of the event but make sure you use authentic Mexican recipes, rather than the Americanized versions of the Mexican foods. Chocolate atole and coconut flan are popular Mexican recipes. Chocolate atole is a hearty corn flour and chocolate drink and coconut flan is a sweet and delicious custard style dessert.
You can make Mexican hats from craft materials if you do not have sombreros. You will need one for each of the two teams. Someone from each team needs to run down to the hat, danced three times around it and run back to tag the next teammate, who has to do the same. The first team to complete the relay wins. You will need a long hallway or a big room for this game.