Rhythm dice, dice with notes

These rhythm dice were created as a teaching aid for music teachers and musical instrument teachers.
Info:

1. The dice dimensions are 20x20 mm. I've printed it on Artillery Hornet with PLA.
2. List of rhythmic values ​​is included in one of the photos, but graphics are not the same (e.g. syncopated rhythm on dice number 4 is presented differently as a group - check the model)
3. Included designed box to hold 8 or 16 dice. My other design ("Box - print in place, ANY SIZE, no support, easy adjustable in FreeCAD") includes this box for easy modification in FreeCad. Maybe the space between the hinges should be changed. I'v printed my box model in PETG on Elegoo Neptune 2s and "hinges gap" 2mm is fine for me.
4. If You are not sure which dice You should print, chose couple from numbers 1, 2,3 or 9. Dices with number 6, 7, 8 have quite unique rhythm.

If you like this project, you'll certainly like my app (for independent rhythm practice) at:
rytm.mojestrony.pl
(You probably would like to change the language in the hamburger menu on the top right)
The app and all other aids are constantly being developed. If you have any questions or suggestions, please let me know. Have Fun!