No no blah blah blah

This week she's started saying "No [whatever the last thing you just said]."

So, yesterday's examples:
Do you want to go to the park? No park.
Let's brush our teeth. No brusha teeth.
Want some dinner? No dinner.
Let's go upstairs. No uh-tairs.
Want to watch Caillou? No caillou.
Come on, walk up the stairs. No wahk uh-tairs.
Say hi to papa (on the phone). No papa phone.

This is all followed up by possibly doing the thing she just adamantly said "No" to, or could be followed up with stamping of feet and crying or whining.

She's even said "No cake". But I still think that was a mistake. She never turns down cake. At least only when there are new toys and a friend to play with, then she MIGHT say no and mean it.