I sometimes amuse myself by using to track dollar bills.  I stamp some dollar bills myself and then use them to pay for stuff.  Tomorrow, I'll be mailing a few bills to a charity in California, just to distribute a few more of them.

I went on a business trip to Abilene, Texas last week.  Took about a dozen stamped bills with me.  Spent some in the Dallas airport and some in Abilene.  To my delight, today I received a notice saying that someone in Abilene entered the serial number of one of these dollar bills into  Talk about quick results!  Talk about covering a lot of ground in just a few days!

It's a fun feeling.

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