Something we did during a few weeks of missions emphasis a couple of years ago was fun. We took digital photos of the children in our church’s Wednesday night program. Then we put together “passports” complete with the children’s pictures and a page for each of the countries that would be discussed in each of the following weeks.
As the children arrived each week, the page that had that week’s country and flag on it was stamped.
This might be even more fun if done during missions conference and you gave a different stamp to each missionary. Then you could have a contest to see how many of the children could collect all of the stamps in their passports.