Guanidine

Okay kiddo, so guanidine is a kind of chemical that's made up of atoms called carbon, nitrogen, and hydrogen. It's used in lots of different things, like medicines and fertilizers.

Now, you know how your body has parts called muscles? Well, sometimes people have a disease called myasthenia gravis, which makes their muscles weak and not work like they should. That's where guanidine comes in - it can help make those muscles stronger and work better.

But guanidine can also be dangerous if you use too much or use it in the wrong way. So it's really important to only use it under the supervision of a doctor or other grown-up who knows what they're doing.

Overall, guanidine is a useful chemical that can help people with certain medical conditions, but it's also something that needs to be handled carefully and responsibly.