Geography Series

I am looking for a good geography series. Here is what I have in mind. I would like a series that allows the students to learn about one continent a year. Kindergarten preferably would just learn the basics about the United States. Then first grade would be about North America, second grade would be about another continent, and so on. I really am looking for a series that is all inclusive--culture, land formations, countries, foods, languages, etc. I am finding it hard to find any good geography series--much less those divided the way I would prefer. I am looking for this for myself as a homeschooling tool. Do you have any suggestions? What series do you use to home school your children or in your classrooms? Do you feel that it is successful in teaching the material in a fun and organized way? If I don't find one soon, I think I am going to begin writing my own.