Kurt Russell and Kathleen Cody started their off screen romance during this film, which continued through their second Disney film together, Superdad (1973).
A Century of Progress International Exposition, also known as The Chicago World's Fair, was a World's Fair held in Chicago, Illinois from 1933 to 1934.
The $5.00 bills Felix gives to both Willie and Rupert Appleby would be worth about $118 a piece in 2023, adjusted for inflation.