This is my remix of the classic herringbone planetary gears. I added the same herringbone pattern on the inside to the outside of the model and it makes a much cleaner print and a much cooler toy.

I've printed these in tons of different color combinations, and I encourage you to try one color for the outer and inner gear, and a second (or third) color for the six interior gears.

A single color version should take about 50g, 2.5h. A dual/triple color version should take about 6-7 hours.

A triple gear alternating color print (named HERRINGBONE PRIME CUBED) should take about 6-7 hours with 30g of each filament if you calibrate low purge amounts.

I recommend setting:

bottom and top patterns to Octagram Spiral

Infill: 20-30%, lighter will spin faster and easier

3 wall loops

Seam: Aligned, which should hide it within the herringbone pattern and make it almost invisible

If you're printing with silk colors like I do, outer wall speeds should be >100mm/s. I use that as a default for an excellent surface finish with any filaments though.