One of my secret shames — or at least, it was a secret before I started writing for the internet — is that I kind of love 13 Going On 30. Despite being garish, saccharine, and very, very silly, it's utterly rewatchable. And if you've revisited 13 Going On 30 as much as I have, you tend to realize that there's a lot more nuance in this film than you'd originally think. And indeed, there are intriguing things in 13 Going On 30 that you probably wouldn't have noticed back in the day (aka 2004).
Of course, at least one of these things wouldn't have necessarily meant anything in 2004, and only becomes relevant with the passage of time. But beyond that, there are plenty of little touches that help make Jenna's story complete. Perhaps unsurprisingly, a lot of those touches have to do with using fashion to showcase certain changes in the magazine character (or just showcase the bizarro sartorial persuasions of 13-year-old girls). And other details visually reflect who Jenna grows up to be, and how deep down she's still the same person. Deep.
...And other things on this list are just plain lolz-worthy. For your amusement, here are 13 of those little things you may not have noticed in 13 Going On 30.