What a good opportunity to bring some culture to your Spanish classes. Use a map and invite your students to find Colombia. You can also use Google Earth to make the trip more interactive and use a play passport for the trip. Share with them some information about this important celebration. Here are some useful resources for teachers to learn about the celebration:
La Fiesta de la Luz (Historia)
The Beautiful Noche de la Velitas in Bogota
Some videos of the celebration:
In the main parts of the big cities, people gather together to watch fireworks and shows.