So, have you ever had a toy phone that only had a few buttons and you could only make a very simple phone call with it? Think of that toy phone as a DS0.
A DS0 is a type of connection used in phone systems to send information in little pieces called "bits". Just like your toy phone, it can only send a few bits at a time, which means it isn't very fast or powerful.
But, when you put a bunch of DS0 connections together, you can create a bigger connection with more power and speed. It's kind of like stacking a bunch of toy phones on top of each other to make a bigger phone.
So, while a DS0 by itself isn't very impressive, when you combine a bunch of them together, you can create a strong and efficient way of transmitting information!