Okay kiddo, so 4-ethoxyamphetamine, also known as 4-Ethoxy-α-methylphenethylamine or 4-ETA, is a type of chemical.
It is similar to a drug called amphetamine, which is used to help people with certain health problems like ADHD or narcolepsy.
But 4-ethoxyamphetamine is not approved for use as a medicine and is actually classified as a "controlled substance" meaning that it is against the law to have or use it without a special permission from the government.
People might use it to get a feeling of being "high" or "euphoric" but that is not safe and could be harmful.
Remember, it is important to always talk to a trusted adult and never try any kind of drug without a doctor's permission.