Marble Christmas Tree

This is a Christmas tree, but it is also a marble machine !
Every turn of the star, 9 christmas marbles race down the tree ! You can watch it in action here : https://youtu.be/YUAoQCp8TZc

It is really simple to make, only three parts to print are needed !
It does not require any screws or tools. You just need to have 60 balls of 6mm in diameter. They can be easily found on your favorite online store.

It can be printed if you have a build volume larger than 15x15x17 cm (XYZ). It fits on a Prusa Mini.

To pimp it up, you can print the star and the elevator in a bright color.
If you have the MMU, you can print it in multiple colors : you can choose a different color for the tree and for the three raceways.
If you don't have the MMU, you can use a 3D-pen to customize it ! It's a lot of fun to do with children !

I have included the f3d files so you can make modifications if you want to. You can also use it as a base to create another marble machine !

Print instructions

No support are required at all ! It's an easy print.

For the three parts I used :

• 3 perimeters
• 3 walls
• 3 top/bottom layer
• 15% infill

For the tree, you don't need that much infill : 5% is more than enough.

For the elevator, I recommend you to use a brim since it is a tall and narrow part.

For the star, print it lying on the bed (as in the picture) !

Happy printing !