What can you do, atleast there not on the dark .. Like alot of kids are these days,Oviously its immpossible to stop them smoking if they want to smoke and going on about it will only make them sneaky about it. I would not mention it too or infront of them. They grow out of it or just be lads who like a smoke?? Soon they be old enough and grown up to make the right decicions and im sure they will do just that