I think you are asking for the HTML tags to be kept in place but the content rewritten. So here’s the revised content with HTML tags intact:
“`html
Are you ready to try a fun and exciting experiment with watermelon and Mentos Cola? Let’s see what happens when we combine these two ingredients!
“`
I hope this is what you were looking for! Let me know if you need anything else.
EXPERIMENT: Watermelon VS Mentos and Cola, 7up, Schweppes, Mirinda & Fanta in the toilet