Students get out of their desks and talk to each other to find someone with a birthday in each month. When I do the activity they also must ask their classmate his/her name in Spanish class, and their classmate must respond and spell it out. Questions are: ¿Cuándo es tu cumpleaños? ¿Cómo te llamas en la clase de español? and ¿Cómo se escribe? You could also have them do the activity without saying names in Spanish class or spelling them out, of course. After the activity (about 10 minutes of them walking around, speaking Spanish only) there are several questions asking about who has a birthday in what season. I hope your students enjoy this as much as mine did!