WOW, thanks all I didn't expect so many responses ;-)

She seems to sneeze 5 or 10 times every hour or so. There's no discharge and definately not green. She's not pawing at her face at all. I havent changed any household products so again I don't think thats a problem.

I'm a real mother hen so it's probably only me being over cautions. It's only been around since this morning and it doens't seem to be getting any worse so I will watch her carefully and take her to the vet on Monday (or sooner) if it doesn't get any better. She's clearly not feeling too bad cause she's still bugging her brother to play

Thanks again all
Nats