You could give a small child mushrooms and it would just get them to see how important nature is younger. The younger the better before they get programmed into the matrix.  It depends on the "substance". to many things are lumped into drugs. And to many toxic "medicines" are called medicine.  Thats just my opinion.

DesertDave

alter_native

Would you or do you smoke pot in front of your children?

I think the main idea is to stress the danger of substances on the growing brain — literature shows that people getting into THC at a young age end up being less successful.
Once you are a grown adult and your brain is mostly formed, have at it!
(But everything in moderation, including moderation).