Wednesday's typewriter doesn't have the English QWERTY layout, but the German QWERTZ. 1) the "Y" and "Z" keys are swapped from their places on English keyboards, since "Z" is more often used in German than in English; 2) Unique German characters are seen, namely eszett (a double S that looks like a Greek beta) and U-umlaut; 3) the shifted characters on the number keys are notably different that English typewriters of the era. It's age is also apparent: there's no "1" key, which was substituted for a lowercase "L" since they looked the same on paper. It wasn't until the advent of computers that a distinction was needed between "l" and "1". A German typewriter goes quite well with Wednesday's perfect mastery of German, as heard in Friend or Woe (2022) when she tried to dissuade German tourists from taking the 'authentic' fudge.
Wednesday's first birthday memory shows several presents including an iron maiden, an electric chair and the medieval pocket mace she made reference to in a prior episode. Her perfect cake has figurines of the whole family and the person whose head is cut off in the guillotine is Wednesday herself. There is also game of Pin-the-Arm on Beetlejuice and a pinata with of a spider filled with spiders.
'Goody' was not a name in the 17th century: it was short for 'Goodwife', a form of feminine address akin to 'miss', 'miz', or 'mrs.' in the modern vernacular (the male equivalent was 'Goodman'). 'Goodwife' or 'Goody' was specifically used for women of lesser social rank, where 'Mistress' was used for the higher-class women.
Miss Thornhill (Christina Ricci) tells Wednesday, "We're alike, you and I." Both have played Wednesday Addams.
According to her birthday cake, Wednesday is turning 16 in this episode.