4-Pack of CDs, US Geography Songs, 5th Edition

Perfect for gifting or for friends to save on postage, purchase this pack to get four of the US Geography Songs, updated for the 5th Edition!
 
Who doesn't like to save on postage?  AND...who wouldn't like a thoughtful, educational gift?  Even your non-CC friends would appreciate the help with US Geography...right?  :-)
 
Please let me know if you would like a pack in a different number!  (i.e. 10 CDs)