Mine (7) whined all morning. We finally had it out, all the way to finale over the issue of whining, storming off and door slamming, for the first time. I gave her a warning to speak to mummy nicely and not bang doors. She tells me i'm interrupting so I tell her she has two minutes to talk with no interruptions- she whines the whole time! Threw in a foot stamp and some righteous indignation. Ended up going downhill, I gave her a warning and timeout in her room. She slammed the door on the way in- when she finished her timeout she came to see me and wouldn't look at me and kept being generally loud and whingy. Gave her warnings and ten minutes in timeout (dragged her under armpits into bathroom.) i also cancelled her sleepover at the cousins' tonight. I have gastro and a ten week old, just wasn't up for it today. She's been an angel all afternoon.