The Virginia type of peanuts is what's sold at these events, as mentioned in a song written in 1908
[DOC] [TLE] Take Me Out to the Ball Game - Wikipedia [PAR] "Take Me Out to the Ball Game" is a 1908 Tin Pan Alley song by Jack Norworth 
and Albert Von Tilzer which has become the unofficial anthem of North American 
baseball, although neither of its authors had attended a game prior to writing the 
song.