Back when I was a child I had a toy that I could assemble to my liking. On top of the tower there was a funel to drop a marble which would then traval downwards through the spirales and
Step 1: Marble / Ball Tower 3D Models
Here are all the 3D models you need to create your play toy. As you can see in the assembly picture it is possible to have multiple starting points but only one end. So feel free to experiment.
Participated in the
3D Printing Contest