I'm too old to know what Phineas and Ferb is, but when I was young I used to love knowing obscure words like:

• The indent between your upper lip and your nose is called the philtrum (more commonly known now because of piercings

• The recess on the bottom of a wine bottle is called a punt.

• The infinity symbol (like a sideways 8) is a lemniscate

• The cap on the pointy end of an umbrella, or any other tubular thing (including a pencil) is called a ferrule

• The space between your eyebrows is your glabella

Etc. Anyway, aglet was one of those. I was always so happy when I had an opportunity to use one ("Oh, man, my aglet broke!").

Aglet. Thanks Phineas and Ferb!

Aglets, and it’s 100% due to Phineas and Ferb

Aglets. Terraria my beloved.

Aglet. Thanks phineas and ferb!

Aglet. Another shout-out to Phineas and Ferb.

Telomeres for your shoestrings

Aglets.

Aglets

I personally don't know what they're called but to my cat that's called food.

Aglet. Archie comics did a bit on them, that's where I learned

Shoes.

Shoes, with the Aglets of the laces resting upon them.

Aglet - phineas and ferb

What, the shoes?

You wanna maybe use a red circle mate?

OP, they’re obviously called aglets.

Didn’t Phineas and Ferb teach you anything?

Aglets.

Laces.

Sneakers.

Shoes? Maybe Reeboks?

Edit: I am appalled by how many people know the term aglet.

Ferrule

Aglets, if you’re talking about the ends on the laces, and please update why you’re asking lol

Aglets. Learned that from Phineas and Ferb.

I knew a kid once who said when he grew up that he wanted to be the guy that puts the aglets on shoelaces.

I don't know what ever happened to him, but I like to think he found his calling in shoe plastics.

Easy. The 80s and older crowd will know this from some inherent eldritch knowledge or have no idea. But everyone else will know this from Jimmy Neutron.
scrolling through the comments, seeing Phineas and Ferb everywhere

I'm only in my mid twenties. Y'all need to stop making me feel old.

I believe there was a book in the 80s called Sniglets that made up words for things and this was one of them. I didn't remember what it was called. Any or all of this memory could be wrong.

🎶 A, G, L, E, T, Aglets! Don't forget it 🎶

^^^One word at a time^^^

A picture of a shoe, with laces, which have plastic aglets on the ends.

Aglets

Aglets.

And their true purpose is sinister.

Aglet. Not Phineas & Ferb. Terraria.

Aglet - Jimmy Neutron

Aglets. Their true purpose is sinister.

Lace tips??

I only know they are aglets thanks to "Repossessed!" Fantastic spoof of The Exorcist with Leslie Neilson and Linda Blair (from the original). Blair played Nancy Aglet and fought possession again. They made a joke about her name that got the word weirdly stuck in my brain. "We've tried everything the devil hates. Sex, drugs, rock and roll..."