How do I bathroom / kitchen / extension? etc.

Is this the right place to ask about flooring?

We're looking to redo the whole ground floor. Two questions:

1. What material? Other than polished concrete (due to the hardness) I'm agnostic. It just needs to be able to handle kids.
   
2. What to do in terms of fitting it where there is an existing kitchen? We don't love it and may change it, but equally might not. If we do genuinely don't know if the layout would change.
   
3. How does it work practically when someone fits it? Do you need temporary storage for your furniture? AOCs?