I would also say that this library covers more or less the “lower half” of solo ball juggling in terms of difficulty. With lower ball counts (say ≤ 4), there are a lot of these patterns that have complex arm movements and can be difficult to explain with words, so having such a listing with animations and step-by-step instructions is very valuable. Starting with 4 balls, there’s less and less time for moving your arms around and it is more about the sequence of heights of the throws, which are well described with just their numeric “siteswap” pattern and you can learn them just from knowing the number sequence. The site has only the most basic of those (e.g. 534) and even very common 4-ball (7531, 633) patterns are missing with hardly anything beyond that.

[1]: https://ianconvy.github.io/projects/other/libraryofjuggling/...

Shout out to anyone that remembers the Mushy Pea juggling shop in Manchester many years ago, where I learned all sorts of circus skills.

There wasn't much on YouTube at the time but I also think YouTube is a worse resource for pretty much all of these simple tricks. All you need is a slow loop to learn any ball juggling trick.

There was also a similar site that let you input siteswaps.

The noob gains once you get comfortable with 3 balls are addictive, compared to later patterns or tricks that can take hours, days or even weeks to pick up.

The rating is described as a rating "1 - 10"

But every trick is actually graded 2 to 9. ( https://libraryofjuggling.com/TricksByDifficulty.html )

Presumably no-one ever wanted to define a grade 1, just in case an easier one was discovered, and similarly for 10.

https://libraryofjuggling.com/Tricks/3balltricks/Factory.htm...