Well, kiddo, 3-fluoroamphetamine is a big, complicated word that means a type of chemical. Chemicals are things that scientists use to study how things work in our world.
This particular chemical is called 3-fluoroamphetamine because it has three parts to it, and one of those parts is called "fluoro." Fluoro is something that makes things glow in the dark, like those stars you have on your ceiling at night.
Now, this chemical is important because some people use it to have fun. But it's not safe for everyone to use, especially kids like you. That's because it can make you feel really strange and even hurt your body if you use too much.
So, while it's cool that scientists study chemicals like 3-fluoroamphetamine to learn more about the world around us, it's important for kids like you to stay away from it and let grown-ups take care of that kind of stuff.