Okay kiddo, do you know what marble is? It's a type of rock that looks really pretty with different colors swirling around in it, kind of like a fancy swirl lollipop.
Now, when we say "ruin marble," we mean we want to damage or destroy that pretty rock. There are a few ways this can happen.
First, we might accidentally chip or scratch the marble while we're using it for something. Maybe we'll drop a heavy book on it or scrape a sharp toy against it. These little scratches and chips might seem small, but they can add up over time and make the marble look less pretty.
Another way we can ruin marble is by exposing it to things that can stain or discolor it. If we spill something like red juice or coffee on the marble and don't clean it up right away, it can leave a permanent stain. Also, if we use harsh chemicals or cleaners on the marble, they can cause the color to fade or change.
In short, if we're not careful with our marble, we can damage it and make it less pretty. So we need to be gentle and take good care of it to keep it looking nice for a long time.