Dec 15 - Christmas Time is Here

I am writing an Extra-Credit paper for Spanish-class on the Spanish Christmas.

1. What are some customs and traditions that Spanish people might do on Christmas?
2. What are some fun facts about Spanish Christmas?
3. What kinds of songs do they sing?
4. What kind of presents do they give?
5. What are the differences between our Christmas and their Christmas?

If you have any knowledge on any of these subjects, please post an answer. As a precaution that everything I write is correct, please make sure that your answer is 100% accurate.

Gracias