Okay kiddo, have you ever heard of something called the "eighth wonder of the world"? It's a really cool thing that people talk about because it's really amazing and impressive.
You know how we have seven wonders of the world, right? Things like the Great Wall of China and the Pyramids of Egypt? Well, the eighth wonder is something that's so incredible that it's almost hard to believe it's real.
There isn't just one thing that's considered the eighth wonder, because different people have different opinions. Some people think it's a natural wonder, like the Grand Canyon. Others think it's a man-made wonder, like the Taj Mahal or the Colosseum. Some people think it's something like the Hoover Dam, which was a massive engineering project that helped control the Colorado River.
The reason people think these things are wonders is because they're so big or so beautiful or so impressive that it's hard to imagine how they were created. The people who built them had to work really hard and use all kinds of tools and technology to make them happen.
So, the eighth wonder of the world is just something that's really, really cool and amazing. It's something that we can all admire and appreciate for how awesome it is. Maybe someday you'll get to visit one of the wonders of the world and see it for yourself!