Complete the exhausted shopper's question to the mall security guard. Choose the correctly punctuated word.

"I have been walking in circles for an hour. Could you please tell me where the _____ shoe department is?"

The correct answer is children's.

"Children" is an irregular plural noun (it is already plural, but it doesn't end in "s"). To make it possessive, we treat it just like a singular noun and add an apostrophe followed by an "s" ('s).