After the trap is built, players who land on the "turn crank" space while an opponent is stopped on the "cheese wheel" space earn an attempt to trigger the trap. The likelihood of successfully triggering the trap relies on a proper amount of force used to turn the crank, and a sturdy construction of the trap itself. If the machine is successfully set into motion with a player on the cheese wheel space, they are subsequently removed from the game. If the machine is not successfully activated, the trap is reset and gameplay continues. When only one player remains, this person is deemed the winner. The rights to the game were sold to Milton Bradley in the 1980's, and currently belong to the Hasbro company. A revamped version of Mouse Trap aimed at younger players was recently developed in partnership with Hasbro's U-Build subsidiary, and requires players to build each piece of the game out of lego-style blocks prior to playing.