Contestants who answer in the form of a question, as though they were on Jeopardy! (1984), are given a warning. After a repeat offense, they are required to wear a dunce cap.
The official disclaimer during the credits read: "'Ben Stein's Money' is the prize budget furnished by the producer. Ben Stein keeps the money in the prize budget not won by the contestants at the end of each production period. If during the production period the winnings exceed the prize budget, producer pays the overage."
'Stein, Ben' originally wanted the prize pot to be $10,000, but it wasn't clear at that time how often he would win. The powers that be chose a more conservative number, $5,000.
For the Halloween 2001 show, Ben and Nancy were costumed as Frankenstein's Monster ("Frank-Ben Stein") and the Bride of Frankenstein.
According to his book "Just A Geek," Wil Wheaton was asked by producers of the show to come in several times to test for the co-host role that ultimately went to Jimmy Kimmel's cousin Sal.