The story continues as to where Arthur's love of both baseball and hot dogs came from. On many sunny days Arthur could often be seen in the shadow of his "big cousins" watching them play baseball and softball at the Palos Baseball Organization ("PBO") fields in Palos Park, Illinois.
Those were the days when Daddy and Artoo started realizing that whenever there were hot dogs there was fun; it was there on those fields that Arthur first learning to "play the day away" all summer.
These were the "big kids" relatively speaking, and Arthur observed it all. You could see him soaking up the scene, and soon enough he would be playing on his own little league team (and getting his own post-game dogs) too!