Juggling is one of hobbies with the highest ratios of being able to impress random people versus the actual effort you have to put in, and I generally find I never forget 3-ball stuff I learned as a kid. It's also as good as a long walk for getting you out of your head when needed. Shout out to anyone that remembers the Mushy Pea juggling shop in Manchester many years ago, where I learned all sorts of circus skills.
Juggling 3 is a skill that is way easier than people think until they do it. But the very next question is will be, "how many can you juggle?" as they apparently think juggling 4 is just 33% more difficult than 3.
Cascade pattern = easy difficulty
Shower pattern = normal difficulty
Box pattern = hard difficulty
As someone who loves to run their hands up and down in the piano in grand sweeping arpeggios, I'm a huge fan of patterns where the perceived difficulty is higher than the actual difficulty.