Ghost in the Lake

In the forest-themed room, there is a small fake pond surrounded by some rocks. The "water" is, in fact, a one-way mirror. For now, players can look into the mirror and see only their own reflection (which is cool on its own!). Next to the pond, there is a vine hanging from the ceiling. When players pull it, it plays a pre-recorded message from the Ghost of the Lake. The ghost asks to knock three times on the (fake) tree trunk in the room. When they do that, they hear bears roaring and another pre-recorded message telling them to scream to chase the bears away. When they scream, the ghost thanks them, revealing the secret of the pond. The LED lights behind the mirror activate and they can see the hidden message behind it. Electronics needed: ⛓ Pull-to-unlock sensor, ✊ Knock Knock sensor, 📣 Noise sensor, 🧩 Universal puzzle controller, 💎 Magic Mirror output set