This is the Harmonica. A very easy to print model. 

Building instructions from top to bottom

1. Top Cover
2. Blow Reed Plate 2
3. Blow Reed Plate 1
4. Middle Part
5. Draw Reed Plate 2
6. Draw Reed Plate 1
7. Bottom Cover

All connected with 4 M3X18mm screws

Enjoy!

UPDATE 14 Apr 2023

I cut the plates to vibrate more easy and open some holes to the covers.

It is a test model and really hard to create noise but it is very nice educational model.