Turn your workspace into a kinetic playground. The Fidget Rolling Marble Pen Holder combines a fully functional desktop organizer with a satisfying, cascading marble track. Designed to keep your hands busy during long meetings or brainstorming sessions, you can drop marbles at the peak of the spiral and watch them glide smoothly down to the catchment basin at the base.

This model is meticulously optimized for clean, multi-material FDM printing. The central pen core prints entirely in Vase Mode to achieve a beautiful, fast, translucent textured finish, while the outer track structure is engineered with precise angles to eliminate the need for supports.

Marble Sizing & Scaling Guide:

• 1.5mm Marble : 100%

• 16mm Marble : 107%

• 20mm Marble : 134%

• Track Layer Height: 0.08mm line height is highly recommended for the main track to create an ultra-smooth, frictionless surface for the marbles to roll down flawlessly.

• Pen Holder Mode: Must be sliced in Vase Mode (Spiralize Outer Contour) for a clean, seamless finish and optimal internal capacity.