When This riddle for escape room is activated, some books in the bookcase begin to move independently, the players hear music from the music box and the ghost laughter. Good effect for the mystical escape room. 

 * Can be used as a hint to a puzzle or a secret niche. For example, after triggering in a bookcase, a secret niche may open.You can give a hint like this: books can be printed with symbols or letters, symbols or letters from moving books will give a hint.Activation is possible not from the motion sensor, but if the players for example "launch" the bookcase with a key or a rotary knob like a music box.

There are various options for this device: 

1. Only one shelf 

2. Bookcase with one shelf that move 

3. A bookcase in which all the shelves move 

4. A bookcase with one shelf that moves + one shelf opens. 

5. Books should be put on one of the shelves and then books will start moving on the second shelf, and the third will open.