Hello there! Imagine you are walking on a path, but instead of going straight, the path goes back and forth like the letter 'Z' many times. This is called a zig-zag trail.
Now, '4 zig-zag folded trails' means there are 4 times that the path bends like a zig-zag, going left and right to help you climb up or down a hill without going straight up. It’s like making 4 sharp turns in a row. If you fold a paper in a zig-zag way 4 times, you get the same pattern!
This kind of trail is fun because it helps you walk safely on steep places and makes the walk more exciting.