The Toy Tiger

Henry Mancini uncredited Herman Stein uncredited

New York City advertising executive Gwen Harkinson is a widow with a son, Timmy, who lives fulltime in an upstate boarding school. She sends art director Rick Todd in that direction to try to rehire Mike Wyman, a former creative talent for the ad agency who has given up that life to become a sculptor.At school, Timmy has been lying to classmates that his father is not only alive but a famous biggame hunter and explorer. Many doubt him. Timmy compounds his tall tale by insisting his fathers on his way for a visit this very minute. When he sees Rick arrive in town, he pretends thats his Dad. ........

Source: Wikipedia