1200 EUR
A box with ropes of different colors - red, white and yellow - is mounted on the ceiling. This box is locked with a magnetic lock and will open after a while. At this point, the ropes will fall down, and the players will realize that they can interact with them. A special hint will tell the players that the ropes need to be pulled a certain number of times.
Successful interaction with the ropes will unlock the magnetic lock or activate the next puzzle.