These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ear Worm: Who's afraid of the big bad wolf, big bad wolf, big bad wolf...
Fridge Brilliance: In an attempt to gain access to Practical Pig's house (at least in the UNCENSORED version), the wolf disguises himself as a Jewish peddler. Since meat from a pig is treif (not kosher), what better way to trick pigs into thinking you're not going to eat them?
Unfortunately, this is only the ORIGINAL cut we're talking about (see Bowdlerize in the Trivia tab).
Growing the Beard: Taken to a literal extreme in Real Life: during the shorts heydey, one New York theater allegedly kept the short playing for so many weeks, that they had a sign posted above it saying "You've kept us here so long, we're growing beards!" complete with illustrations of the Three Little Pigs with real beards put on them. And they deliberately made the beards longer as time went by.
Previously, cartoons had little story and focused more on surreal imagery that would repeat at times. Afterwards, cartoons began to focus more on a plot than animating something for the sake of it.