All. By. Himself.
If you have not been following Wonderboy's adventures, you might be wondering what the big deal is about that. He turned two in December, can walk and climb stairs, and enjoys trying to jump. But his particular developmental delays (a combination of several factors including high muscle tone, poor motor planning, hearing loss, and other issues) have caused him to have peculiar gaps in his gross motor skills. He cannot sit up from a lying-down position (neither belly nor back), and until today, he had never managed to stand up without assistance.
But today, during one of their typical roughhouse/practice sessions, Scott put the Boy on his belly, and to our delight and his own jubilation, Wonderboy pushed up onto his knees, and then slowly, with great effort, continued pushing until he was on his feet, hands still touching the floor. He rocked backward a bit, found his balance, shifted his hands one at a time to his knees—and straightened up. And broke into a thousand-watt grin. And cheered and laughed and stomped his feet.
And threw himself for joy into his daddy's arms.