Putting proper objects on weight in correct sequence opens the electromagnetic lock. Strip of LED fills with lights as you solve the puzzle. If you make a mistake the game starts from the beginning. You can use up to 10 objects of different weight for this prop. Sound effects are saved on SD card and can be changed by user. Each object can have specific sounds connected to it, like hints where to find the following object, or clues to solve. It can become a very complex puzzle to play with.