These are a few of my favorite things:

decorations are hung between houses
Christmas plays – pastorelas – at school
posadas, or reenactments of Mary and Joseph looking for lodging in Bethlehem
followed by prayers, food, and piñatas,

which of course are sold at vegetable stands
nacimientos – nativity scenes

buñuelos or fried masa often drenched in melted piloncillo
¡Feliz Navidad!
Merry Christmas!