Enjoy solving the most mind-wrapping games, such as Monty-Hall game, Monty-Hall who does not know, Boy-Girl questions, The crazy king challenge, and the Penny Ante Tossing game.
each game has its own explanation/related videos page,
non-Questionary games have an "automate" button, which performs 100 rounds of the selected game, which is helpful when you want to see how does the probability is getting very close to some number.