Hi:) a great way to reach anything is to make it a song or make it a game. I think a great game is a matching game. For example, if there’s a poster board with the words “his, hers, my, their, our, it’s” and someone can hold a sticker with tape on the back of it. Then, read a question aloud and ask that person to match which possessive pronoun it applies to. Example: “I am holding __ pencil. Who’s pencil is it” (pencil having your name on it) or “The neighbors have a really nice house. I like __ decorations”
Hope this helps :)