Wits and Wagers has lots of good quantitative questions for calibration exercises.
The same equipment lets you play the updating game (divide into small groups, come up with point estimates individually, then update on others’ numbers and see whether on average it moved you closer),
I recommend paranoid debating / the Aumann game / calibration exercises with trivia (answer trivia questions with confidence intervals).
Wits and Wagers has lots of good quantitative questions for calibration exercises.
The same equipment lets you play the updating game (divide into small groups, come up with point estimates individually, then update on others’ numbers and see whether on average it moved you closer),