Just standing around

Last week William started standing for a few seconds without holding on to anything. It happens sometimes while he's holding a boardbook from the library or his sippy bottle or his little stuffed elephant. He ocassionally leans with his back or stomach gently up against the chair or the couch or my legs to keep his balance. But every now and then he pulls himself up to a standing position and grabs on to something with one hand, leaving the other in place to help him stay up. Then without a second thought, or any concious decision, he just lets go, holding with both hands his treaure for that moment, and simply stands there looking at it, completely unaware of what he's actually doing, and totally oblivious to his parents who are quietly bursting with joy over the simple act of their little boy standing on his own two feet.