Alright kiddo, so have you ever seen a really cool painting on the wall before? Well, imagine if that painting was actually made on a really BIG wall, like the side of a cliff or a huge rock. That's what's called a "plains hide painting".
Here's how it works: first, people back in the olden days would find a nice, big, flat surface out in nature, like a rockface or the side of a hill. Then, they'd use special kinds of paint made from natural materials, kinda like the way you might use paint made from crayons or markers.
But painting a big rock is harder than painting on paper, though, because you need some extra tools to help you reach all the way to the top. Some people would use things like long sticks with brushes on the end, almost like magic wands for painting!
Now, some people might come by and see the painting, but others might just walk right past and never notice it. That's why these paintings are sometimes called "hide paintings"- they're like a secret that only a few people might know about, hiding in plain sight!
Overall, plains hide painting is a really cool way of making art that's different from the kind of paintings you might see in a museum or in a book. It's all about using nature itself as your canvas, and creating something beautiful that's a part of the world around us!