Concept:The possessive form of a plural noun that does not end in "s" is created by adding "'s" to the word.Explanation:"Children" is the irregular plural form of "child".This word does not end in the letter "s".To show that the toys belong to the children, we need to add an apostrophe and an "s" at the end.Therefore, the correct possessive form is "children's", as in "the children's toys".The other options fail to form the possessive correctly.Answer:D. children's