Our child was a "scaredy cat", and just showing him the labels that had the big "WARNING" on it and telling him it would KILL him was enough to make him decide on his own to leave the chemical world to mom and dad. We were very honest with him on what it would do to him.

However...

We also went with the mag lock system. We kept the key up where he couldn't get to it. See INSTRUCTIONAL Video.....(King's Hawaiian)