If none of my other twisty marble puzzles are small enough for you, this is the one! Kwiblito is more fidget toy than puzzle, with only 6 marbles that spin around a single track. Flip flop the halves with a satisfying magnetic snap!
Due to it's simplicity, Kwiblito is fairly lenient with marble sizes, so anything between 13.5mm to 14mm should work well, but it was technically designed for use with these 14mm ABS or Acrylic no hole beads (actual diameter is ~13.6mm)
Glue in 4 6mmx3mm (1/4"x1/8") neodymium magnets for a smooth and satisfying snap between positions. The magnets should fit snugly in the holes and you may need to use a flat surface to press fit the magnets flush. I also use E6000 craft adhesive to make sure the magnets are absolutely fixed in place. I used ABS for the center clip. PLA might work, but this is a very tiny part, so I can't guarantee it! Feel free to share your results with different materials in the comments :)
Add beads, then use the kwiblito_clip.stl to snap the two halves together to securely join the puzzle.
Sources for Non-printed Parts
14mm no hole ABS beads
6mmx3mm Neodymium magnets
E6000 Craft Adhesive