Wood postcards have been produced and sold in the U.S. as keepsakes. Wooden postcards were sold for the
1904 St. Louis World's Fair held in
Forest Park. Many included puns associated with wood: "Exposition is more than oak-a", "it is ash-tonishing", I wood spruce up and come", "You walnut regret it." and "Butternut delay". The
Lewis and Clark Exposition of 1905 and the
Jamestown Exposition of 1907 included wooden postcard
souvenirs. The tradition of folksy puns continued in later wooden postcard lines. Others feature images, cartoons, advertisements and event commemorations.