The plural form of a toy is-

In Noun-Number, there are two types of numbers: singular and plural. A noun that refers to multiple individuals or objects is said to be in the plural. A singular noun is one that only refers to one individual or object. Remove the 'y' and add -ies to make a singular noun plural if the letter before the 'y' is a consonant. Simply add a -s to make a singular word plural if the letter before the last -y is a vowel; hence toys is the plural form of the word toy.  As a result, the choices for toies, toyes, and toyves are incorrect.