Answer:
No, don't put that in Brittany's locker!
The children's toys needed to be put away in a safe place.
Explanation:
The first sentence was missing an apostrophe before the "s" in Brittany. Since the pronoun is possessive (meaning the locker belongs to Brittany), you need to add an apostrophe, or the sentence will seem like there are multiple Brittanies.
Not sure if how exactly you wanted me to fix the last two sentences. The first version was correct, but the second one was different since the apostrophe was missing in "children's."
I hope this helps.
