He's actually six next month but that's beside the point.
We were round inlaws this evening and ds1 saw a lighter and said look look a lighter and said his brother had picked it up he said it needs to go out of our reach. Mil said no its staying there your both old enough now to be told not to touch it. Dh picked it up to put away and mil very firmly put them back on the table. I pointed out that actually by seeing a lighter and telling a grown-up he was actually doing the right thing. But she kept saying no theyre old enough now to know not to touch it. And there it stayed til fil went outside to smoke. He must have put it in his pocket after that.
I also pointed that when we stay in their caravan the first thing we do is take the matches and put them on top of the cupboard. She said that's rediculous and we should leave them in the drawer because they are old enough to be told not to touch them.