Walking the stairs...

Lately I've been trying to encourage Annabeth to walk up and down the stairs on her own. I figure that she should be able to do this now - and she's getting heavier and heavier to carry. This morning when we were walking downstairs, she said, "My knees are old." I'm sure she must have heard this from her Grandma Maria, but it was so funny coming from a 2 year old.