Up the stairs

It seems that Noa has discovered the stairs.  This little girl is not yet walking, instead she's hauling herself up and bracing herself on solid furniture, bouncing on the soles of her feet, and generally acting as if she's on the cusp of some big breakthrough.

She's also drooling like crazy and waking up in the middle of the night, much to the "delight" of her parents.  How can anyone be so cheerful in the middle of the night, especially in the face of two grumpy parents?