Lionel Jeffries movies
A down-on-his-luck inventor turns a broken-down Grand Prix car into a fancy vehicle for his children, and then they go off on a magical fantasy adventure to save their grandfather in a far-off land.
When a spaceship lands on the moon, it is hailed as a new accomplishment, before it becomes clear that a Victorian party completed the journey in 1899, leading investigators to that mission's last survivor.