When Katie is gone for the day, the family hires three cleaning ladies to restore the house to normal.
Steve (Fred MacMurray) gives Chip (Stanley Livingston) a well-preserved secondhand car for his birthday.
Chip manages to outwit the machine age when a computer is used to select partners for a school picnic.
Chip invites a long-haired, guitar-playing boy from Liverpool to be a key addition to his off-key band.
Robbie and Katie agree to act as chaperons when Chip and his friends decide to spend a weekend at a cabin in the mountains.