I'm guessing that your students are elementary or lower. One thing you can do is get some students to give you items of theirs that they can recognise. Hold up (say) Maria's pen and use it to practise things like "Is this Pierre's pen..is it his?..no, it's Maria's pen..her pen...your pen.. that sort of thing. It makes a good all-class practice once the basic vocabulary has been mastered.
For a fuller practice you could try this game which involves making some simple dice.
Finally if you type "personal pronouns EFL" in a search engine, you'll find further ideas. Good luck!
For a fuller practice you could try this game which involves making some simple dice.
Finally if you type "personal pronouns EFL" in a search engine, you'll find further ideas. Good luck!