This is a box I built for my daughter's birthday. She and her friends completed tasks and got various items when each task completed. 

Once they had all the items, they needed to find  the right order to present them to the box so the box would open.

Video

you can see all the details in the video below.

Code

https://github.com/iollama/escaperooms/tree/main/escape-room-riddle-box

Part list

* UART Serial MP3 Music Player Module - https://amzn.to/2HIERde
* Arduino NANO compatible board: https://amzn.to/3myqerZ
* Arduino IO shield: https://amzn.to/3oNOeJQ
* Lock: https://amzn.to/3ox0pdI
* Relay: https://amzn.to/3jyShFW
* RF reader: https://amzn.to/2HKM78S
* LED matrix: https://amzn.to/3jBOBmN
* Battery holder: https://amzn.to/3mwE9Po