We have just finished an "all-school" fiesta day in conjunction with San Antonio's annual Fiesta celebrations. Here are some of the activities we had:

Preschool/Kinder Parade--our littlest ones parade through the parking lot to the accompaniment of mariachis. "Princesses" ride in decorated wagons pulled by handsome princes. The "band" plays their favorite tunes on rhythm instruments, and the clowns carry balloons. The rest of the school lines the parade route and waves and cheers.

Pinatas--we fill these with trinkets and candy and enjoy this traditional activity. If candy isn't an option, try filling the pinata with math facts written on pieces of colorful tagboard.

Crafts--Ojo de Dios, yarn art, tissue paper flowers, cascarones, etc. Google can help you find lots of ideas.

Food--Raspas (snow cones), nachos, empanadas, tortillas (several of these foods would work well in "Kid's Kitchen".

We read stories...
Too Many Tamales,
Chato's Kitchen,
Fiesta Fiasco, and
F is for Fiesta, are some of my favorites).

Dancing--Mexican hat dance is a favorite.

Spanish--Learn to greet each other in Spanish, to count to 10, etc. Create a Spanish ABC book.

History--research Cinco de Mayo.

And yes, make salsa or pico de gallo!