1100 EUR
The symbol of a bird is depicted on the stump, and the side of the stump is decorated with artificial moss.
A knock sound is played from the common speakers, which the players need to repeat by tapping on the stump. After a correctly reproduced knock, a hiding place hidden in a tree stump will open.
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.