(edit: I see I missed the part about being fun, but I don't know of better alternatives)
I learnt with the one on the main site, "the Rust book" which is good for explaining concepts and is (or certainly was) considered the standard textbook.
Rust by Example is good for a quick start in how to do various things, but imho is most valuable for experienced programmers and as a cheatsheet-style reference.
Once you start writing your own code, it's useful to look at Blessed.rs to show what are the fairly standard options for basic libraries for logging, http, etc that you might have expected to be in the standard library. It's useful to be pointed at something that's good enough instead of spending hours investigating the various competing crates.
Just in case everyone doesn't already know, urine can provoke jellyfish stingers to release even more venom. Use vinegar or rubbing alcohol instead, or, falling that, seawater.