6" Skeleton Bone Pens - Halloween Candy Alternative (Package of 12) Go to amazon.com Related posts 8 best biology gifts Feature12 per order6" assorted bone pensGreat candy alternative for HalloweenExcellent gift for biology students, nurses, or doctorsBlack ink DescriptionThis fun assortment of festive pens are very detailed and make a fun gift! They come in the shape of spines, femurs, and more.Recommended for ages 5+