This is a rotating carousel for markers, pens, pencils, paint brushes, or anything that will fit. It will hold 88 pens or markers, and has a center cup to store more, or other items. It only has 2 parts, making it an easy build. The carousel spins on a cone on the base, so it doesn't require bearings or any other moving parts. I printed this with PLA and a 0.6 mm nozzle. Total print time was 30 hours, but I printed very slow.
There is a caddy thing that attaches to the bottom row for items such as chalk, erasers, and pencil sharpeners. The caddy is designed so 6 will fit around the carousel.
20 or less depending on printer