I don't have a child, but when I was a child it never came up at all until high school...even though I was in the gifted program and so on.
Elementary school. We just bring it up or make it a topic of conversation from time to time.
my kids just kept thinking about penetentary
to learn a trade....house breaking made easy
safe cracking..how to be a pick pocket
how to use a jemmy properly
how to hot wire a car
A few years after high school.