The sentence structure contributes to the passage because it helps to find textual evidence
"and now we are as the deer" this is a simile because they used as
santiago built a display case for the crystal
So, a possessive noun is usually used to indicate who or what has something, like "The Dogs' ball."
To change this form of children,plural, to a possessive noun, you will want to add an apostrophe, and then an s. It changes to this:
Children's