I created a rounded pencil impossible pass thru fidget toy with a few different sizes for easy printing, and if you print all three it has the appearance of being used, same sharpened point but less eraser as it gets smaller.

I also created print profiles that slows down the acceleration to try and avoid wobble at higher heights. Brim is enabled for both objects. Spiral has outside brim, pencil casing has inside brim. As well as xy compensation for the spirals (set to -0.55mm). If you use the stls make sure to adjust your size based on your printers tolerances. The two smaller pencils are fairly easy to print. The large one can be a bit tricky and might require enabling both internal and external brims, like any tall skinny object it will suffer from high speed wobble. Makes for a good stress test for your printer and plate adhesion.