1: First, I would recommend doing a model round. You could use pennies to make the activity more interesting. Start out by telling the class something you've never done. For example, "I've never been to Australia." Anyone who has been to Australia must tell a story about their trip. They recieve a penny for having experience.

2: After a story is told, their classmates ask follow-up questions. Anyone who asks a follow up question recieves a penny.

3: Play continues to the right as the next person says, "I've never..." Again, students who have done this receive a penny.

4: Once the students have gotten the idea, put them in groups to continue the activity. (You could continue to play as a whole class, but there's more time for language production if they're in groups.) At the end, see who has the most pennies and joke about this person being the most experienced.

A variation on this game may be better for grammatical review than conversation practice. Play this as a whole class game. Start with everyone standing up. Students sit down if they've never done something. Those standing should tell their stories to the whole class. The person with the most experience is the only one left standing. That person wins the game.