I can't

So this morning she wanted to make cookies. I was getting together all the ingredients and we had this conversation:

KK- "Wait, I need my rolling pin"
ME- "OK, where is it?"
KK- "It's in my bedroom"
ME- "OK, well go get it then"
KK- "I can't!"
ME- "What do you mean you can't?"
KK- "IT MEANS... I can NOT"

I wonder why I always feel like I need a nap?