Get an assortment of candies and snacks. Have people randomly select one item then rank on a scale of 1 to 10 how much they like the item. average the number across everyone’s ranking.
Give people an opportunity to trade with one another for 1 minute. Then allow everyone to rate how much they like their new item, and compare the change in level of satisfaction.
How does this make you think of giving to charity? Would it be better to give someone something they actually need or what you think is best for them?