500 EUR
The piano lid is initially closed with magnetic locks. It will open only after the players solve the previous puzzle or perform a certain action.
In a piano, some keys are marked with bird silhouettes in maroon. It is on these keys that you need to press, and the order will be determined by the hint.
As soon as the players play the correct chord, the piano will open a hiding place at the top.
This puzzle can be changed and reprogrammed based on your task. Possible to open magnetic locks, activate another puzzle, play music, turn the light on/off. Just let us know about it to calculate additional functions.