They look mildly interested when the postie comes in case it's something for them to try.
They learn to open things without tearing the packaging "in case they have to go back".
If something goes wrong their first suggestion isn't the emergency services or trading standards, they say "blog about it mum".
They measure your pride or otherwise by asking: "Did you blog about what I did?"
They get huffy when you don't blog about them.
You overhear them telling their friends: "My mum's got a blog." The friends look baffled.
They yell at you to stop the car and take a photo because the sun rise looks nice.