Loufrani’s actions irked Ball， who felt that such a universal symbol should remain in the public domain in perpetuity. So in a pleasant proactive move， Ball declared in 1999 that the first Friday in October would be “World Smile Day” to promote general kindness and charity toward children in need. Ball died in 2001.

The Worcester exhibit opens on “World Smile Day”， Oct. 6. It features a plethora of Smiley Face merchandise—from the original Ball buttons to plastic purses and a toilet seat—and contemporary interpretations by local artists. The exhibit is scheduled to run through Feb. 11.