ELI5: Explain Like I'm 5

Kruskal's tree theorem

Okay kiddo, so imagine you have a big forest with lots and lots of trees. Now, imagine that you want to connect all the trees in the forest by making paths between them.

Kruskal's tree theorem says that if you start making those paths between the trees, you should always choose the shortest path possible.

But, there's one important rule you have to follow: you can't make any loops! That means you can't make a path that goes from one tree to another, and then back to the first tree again.

If you keep following these rules, then eventually you'll connect all the trees in the forest with the shortest paths possible. Pretty cool, huh?