Made for engagment ! this thing include these parts :

1. NEOPIXEL RING - 12 X 5050 RGB LED WITH INTEGRATED DRIVERS
2. arduino nano
3. 4 batteries AAA
4. micro switch

parts for print: 1X base part 1X top part 1X Battery Cap 4X Inside Ring 4X Letters ring 1X Lock ring

To choose which name will open the box you should put the ring letters inside the inner ring so that your chosen letter will be facing the socket inside the inner ring(image-example of the letter 'S')