I thought this might be an interesting idea for a thread 
DS1 is f*ing ASTONISHING at negotiation. He is almost 9 but has been developing these skills since the age of.... well, since he began to talk in sentences. He has just come in and asked for an extra 10 minutes of video game time, which he then graciously agreed to drop to 5 min. I thought we'd held a good parental line until I realised that the extra 5 minutes was his aim all along
it would NEVER have occurred to me to do this at his age. I'd have said 'Can I have an extra 5 min' and stropped over the inevitable no! There are many other examples but this is the one that has just happened.
Please regale me with tales from your households (yes, I'm bored).