First Arduino Project, a marble roller coaster

i made this as a project for educational purposes.
and now would like to share this with the rest of you.

the largest piece is +- 295 x 190 x 45mm

for now i have only uploaded the .stl files.
and an assambly file of all the 3D printed files.
In the future i will upload everything needed to create this.
- all the electric components
- the arduino .ino file
- maybe even the .ipt files for inventor future modeling