Geography is one of our favorite subjects so I research as much as possible before the start of a year. These websites have great insight into countries and we use them as supplements to our reading unless the country is one where I found little info on that I liked. There is often enough information to use these sites alone, many with living geography as their style. These are not geography games, but prayer websites, info for children, etc.
http://www.operationworld.org/ This is a favorite, it often includes prayer videos by native people and beautiful video images.
What I usually do when planning, is visit all these sites once I know which countries we are looking at for the year and see what I can use. There are days I use only these sites and find that for their ages (9yo, 6yo, 4yo) there is enough information. We also color a page of the country flag and add crafts or recipes from books or other resources.