When I worked in quant finance @ SIG, we'd play this game called "Make a Market" for $1,000... It's kinda interesting: 1) An unbiased person picks a random question (e.g. What's the population of Tanzania) 2) Person A makes a market (say 30million-100million) 3) Person B can "tighten" the market (e.g. 50M - 80M) or buy/sell (e.g. below 30M or above 100M) 4) Person A can then "tighten" the market (e.g. 60M - 65M) or buy/sell (below 60M or above 65M) The game ends when somebody buys/sells... Let's say Person A "buys" 65M. The popular of Tanzania is 72M so they'd win the $1,000. If they "sold" 60M, they'd lose. If the population was between 60-65M, then they'd also lose... The game teaches you a lot about trading/risk tolerance/confidence in your assumptions