<P> In more recent times, wooden nickel trading has become more popular . Individuals can have their own personalized token made and then trade with others who also have had their own made . This is especially popular in geocaching . </P> <P> An American adage, "Don't take any wooden nickels" is considered a lighthearted reminder to be cautious in one's dealings . This adage, too, precedes the use of wooden nickels as a replacement currency, suggesting that its origins lie not in the genuine monetary value of nickels but rather in their purely commemorative nature . </P>

Where did the expression wooden nickel come from