Focus on the Family has a free devotional for families and children at http://www.thrivingfamily.com/Features/Magazine/2013/around-the-world-in-60-days.aspx
You will simply need to register your email and print the material. Simple.
You and your children will explore 27 different countries on six continents on a virtual trip. There is a biblical lesson for each day and an activity that will help you and your kids get a little glimpse into another culture. You can print off a passport for them along with stickers to put in their passport as you complete your travel in a particular country.
This is a fun, simple, and biblical way to help your children see that the Lord desires for people of all groups to worship Him and Him alone. It will teach them to remember to pray for people as you and your family spend time together in family devotions. Its all laid out for you to simply print, schedule a few minutes each day, and know that you are impressing upon their hearts how great our God is, and the wondrous works He is doing in our world.