Okay kiddo, have you ever looked at the back of your TV or computer and seen all those little metal legs sticking out of the chips and electronic components? Those legs are called pins, and they help the chips connect to the circuit board inside the device.
Sometimes, chips come in a special shape called a zig-zag in-line package or Z-Package for short. It looks a little bit like a lightning bolt or a zig-zag snake! Instead of straight pins that stick out of the sides of the chip, the pins of a Z-package stick out of the bottom in a zig-zag pattern.
Why do they make chips like this? Well, Z-Packages are really good for making chips that need to be small, but still have lots of pins for connecting to the circuit board. By zig-zagging the pins on the bottom of the chip, they can fit more pins in a smaller space.
So that's basically what a zig-zag in-line package is - a special kind of chip with pins that zig and zag out the bottom to fit more pins in a smaller space. Pretty cool, huh?