Roller

...roller by warwick3d thingiverse roller

...roller by justinbarrera14 thingiverse roller

...roller by shvanmajd thingiverse roller

...roller bearing by innovationengineer thingiverse roller bearing diameter 90x40. the number of rollers 14.

...paint roller adapter by ecodad thingiverse mini-roller to standard paint roller adapter

...roller bearing by habibisoft thingiverse roller bearing 60 mm 20 mm 18 roller

...roller mini 4wd by zinzo86 thingiverse 10mm roller & 14mm roller for mini 4wd

...leaf roller by ingmar6000 thingiverse roller

...colourbox roller by ingmar6000 thingiverse roller

...roller by justinbarrera14 thingiverse roller 1

...physics exercise "roller's on track". i won't link to the exercises as this will short-circuit some learning.

...roller by warwick3d thingiverse roller

...roller by justinbarrera14 thingiverse roller

...roller by shvanmajd thingiverse roller

...roller by justinbarrera14 thingiverse roller 1

...roller by sekom thingiverse roller toy

...lint roller thingiverse for sticky lint rollers

...roller cookie thingiverse roller cokie form

... in your hand print the caps once and the rollers twice i recommend printing the lids on 100% infill and the rollers on about 10%