It was probably a good thing they had Nanny and not just Hal's mechanical ability because the Professor is strapped for money, as academicians usually are. Nanny gets an old Model A for the cost of towing to the Everett house plus her grandmother's recipe for shepherd's pie. She and the kids manage to get the thing cleaned up and in running order, and Nanny takes her driving test (after some interesting driving lessons from the Professor) that turns more than interesting. Trivia - the first Model A hit the market on December 2, 1927; Richard Long (Professor Everett) was born two weeks later.