She had quite lost her air of discomfort and boredom.

Her eyes were shining brightly; and her pale cheeks were a little flushed with the excitement of her situation.
It is by no means improbable that the Twins, as well-brought-up children, were aware that it is not etiquette to speak to royal personages unless they first speak to you.

If they were, they did not let that knowledge stand in the way of the gratification of their healthy curiosity.

It may be they felt that in the free green wood the etiquette of courts was out of place.

At any rate they did not let it trammel them; and since their healthy curiosity was of the liveliest kind they submitted the princess to searching, even exhaustive, interrogation about the life of a royal child at a German court.
They questioned her about the hour she rose, the breakfast she ate, the lessons she learned, the walks she took, the lunch she ate, the games she played, her afternoon occupations, her dolls, her pets, her tea, her occupations after tea, her dinner, her occupations after dinner, the hour she went to bed.
There seemed nothing impertinent in their curiosity to the princess; it was only natural that every detail of the life of a person of her importance should be of the greatest interest to less fortunate mortals.