they know what a cigarette is they just don't know what one is actually called.
the closest was DD who called it a "flag"
DS is 9.10 and DD 5.10
they also call all alcohol beer and have been known to pull a face at people who say they are going to the pub.
DD has also gone up to a man smoking and told him he was going to die because he smokes.
I did tell her that was rude and she wasn't to do it, but i did smile inside.