Sweet, positive messages about the value of play, relaxation ("doing nothing"), and connecting with family. Being present for life and finding work-life balance are major themes of the story, as is the power of childlike imagination. Christopher Robin remembers to be grateful for everything he has in his life. There's also a clear message at the end of the movie about why everyone, not just the rich, deserves time off to enjoy the countryside, nature, or just time with their families.
Pooh calls himself a "bear of very little brain," and, in anger, adult Christopher Robin says he is one. Christopher Robin also calls Winslow a "woozle." Other words/phrases/exclamations include "good heavens," "what the devil," "codswallop," "cracked," "cripes," and "lost his marbles."
Nothing on camera, but there's plenty of Winnie the Pooh merchandise available.