Actually, I lie. Ellie has learned how to stand up in chairs, but she has also learned that Mommy doesn't like her to stand up in chairs. Her response to this knowledge is not, as sensible people might imagine, to abate her chair standing, but rather to increase it, and couple it with grinning at said Mommy so that Mommy is completely certain that Ellie knows not to stand in the chair.
And it is so ridiculously cute. And dangerous. But cute. Curses.