What do the spanish throw from floats on 5 January?

On January 5th, the eve of Epiphany, the Spanish throw candy from floats during the Cabalgata de Reyes Magos (Procession of the Three Kings). This is a large parade celebrating the arrival of the Three Wise Men (Melchior, Caspar, and Balthazar) who brought gifts to baby Jesus.

The candy is a symbol of the gifts the kings brought, and children eagerly try to catch it as the floats pass by. It's a fun and festive tradition that brings joy to children and families alike.