Three is something of a magical number, no? "Three wishes from the genie in the bottle" immediately leaps to mind.
From Indiana, this three-fer question:
If you could describe yourself in three words, what would they be?
From Victoria on a card showing the workings of a Welsh coal mining operation:
If you were far underground, what three things would you take down with you and what three things would you leave "upstairs"?
And the bonus question, on a card from Moldova:
Einstein said, "Imagination is more important than knowledge." Is it better to know the reality (real life) or to live in a fantasy, no matter how false it can be?
Break into small groups, discuss, prepare to report back to the group...