Ask for a volunteer, blindfold them and then stand them in the middle of a group of people. The rest of the group then moves around the blindfolded person until someone is secretly chosen to stand behind them. Once someone is behind the person they tap them on the shoulder to let them know that it's time to begin prophesying. Blindfolded person duly hears from God and shares prophetic words!
I have played this game 3 times now. Twice with the youth group I lead and once with my adult small group. I have been amazed at the accuracy of the prophetic words that have been delivered. Why don't you give it a go!