Volunteer opportunities (Mexico City)

Hello all!
I'm seeking volunteer opportunities or others who would like to help out in the community. I love working with kids and I'm interested in any input or experiences any one could share about volunteering in the city or nearby. I work during the week and I'm looking for any opportunities I can contribute to during the weekends.

Ya tengo varios años viviendo en México DF y me encantaría poder contribuir y dedicar tiempo los fines de semana como voluntaria. Si saben de cualquier oportunidad porfavor avísame! Muchas gracias!