Okay, kiddo. So, you know how when you go on a boat ride, you have to get on and off the boat somehow? Well, a ferry slip is like a special spot where the big boat, called a ferry, stops so that people and cars can get on and off easily. It's kind of like a parking spot, but for boats.
Usually, a ferry slip is built on the shore of a river or a bay, and it has a long platform or pier that extends out into the water. The ferry boat pulls up to the platform, and then people can walk or drive their cars onto the boat from there.
The ferry slip also has things on it to help people and cars get on and off safely. There might be big metal ramps that lower down from the ferry onto the platform, or there might be stairs that people can climb up or down. And there are usually ropes and cables to hold the boat in place so it doesn't drift away while people are getting on or off.
So, that's what a ferry slip is, kid. It's a special spot where a big boat called a ferry stops so people and cars can easily get on and off.