This booklet is designed to educate parents about marijuana so that they can communicate with their children in a way that will prevent drug abuse. The information is presented in a question/answer format. The following 25 questions are addressed: What is marijuana? What are the current slang terms for marijuana? How is marijuana used? How many people smoke marijuana? How can I tell if my child has been using marijuana? Why do young people use marijuana? Does using marijuana lead to other drugs? What are the effects of marijuana? What happens after a person smokes marijuana? How long does marijuana stay in the user's body? Can a user have a bad reaction? How is marijuana harmful? How does marijuana affect driving? What are the long-term effects of marijuana? What about pregnancy? What happens if a nursing mother uses marijuana? How does marijuana affect the brain? Can the drug cause mental illness? Do marijuana users lose their motivation? Can a person become addicted to marijuana? What is "tolerance" for marijuana? Are their treatments to help marijuana users? Can marijuana be used as medicine? and How can I prevent my child from getting involved with marijuana? Also presented is a section on talking with children about marijuana. (Includes 11 resources.) (MKA)