[Devora]

Heifer International does work in Guatemala (and Central America more broadly) -- it's really concrete because your donation is translated into how many goats, chickens, etc. it buys.

Fotokids is a great project that's working with children who live at the Guatemala City dump and in some of the areas that were most affected by the civil war. They train kids in photography, distribute their photos, and use the proceeds to provide scholarships for the kids to stay in school.

Three are SO many NGOs working in Guatemala that if you do a Google search I'm sure you'll find something age appropriate.