While unloading the kids from the car, I had baby Sylvie in one arm with a bag of stuff dangling from that wrist and my keys in that hand; and I let Caroline out of her carseat with my right hand before picking up another bag of stuff, a cup, and some art papers. I told Caroline she'd have to hold her own water cup and her small toy and carry them inside herself.
She said, "I'm afraid I can't."
And why not?
"I only have two hands, Mom."