ELI5: Explain Like I'm 5

The Spider's Thread

Okay kiddo, have you ever seen a spider make a web? Well, sometimes they take a long thin string of silk and drop it off their web. This is called a "spider's thread". Now, imagine that you are walking through a forest and you get lost. You don't know where to go and you start to feel scared. But, if you happen to see a spider's thread, you can follow it and it will lead you back to safety. Isn't that neat? Spiders are like nature's little helpers!