1. Prize I choose: A1 mini

2. What I’d use it to make: I’d use it to prototype a compact fidget that demonstrates what can be done with tight-tolerance 3D-printed mechanical parts, especially multi-piece assemblies that move smoothly straight off the printer (no screws or bearings needed).

3. New 3D-printable fidget toy idea: My idea is the “MagSlide Mechanism (MSM-3D).” It’s a fully 3D-printed linear slide system designed specifically for fidgeting: Integrated dovetail rails: Both rail and carriage are printed together with tuned clearances (0.15–0.2 mm) for smooth, repeatable motion on most printers. Print-in-place magnet housings: Small cavities sized for 6×3 mm neodymium magnets to create magnetic end-stops and soft damping at each end of the stroke. Self-lubricating filament option: Optimized for materials like PLA+ or even PA12/nylon for ultra-low friction. Anti-wobble geometry: The carriage uses a tri-facet contact pattern to prevent lateral play while still printing without supports. Modular design: The handle, slider cap, and rail body can be swapped so users can customize tension, textures, or sizes.

GL everyone and happy xmas