I liked the sculpture "72 Pencils" by George Hart so much, I decided to make one for myself. The sculpture consists of 72 pencils (strangely enough) arrayed into 4 hexagonal tubes. Each tube is built up from a single tight bundle by moving the pencils out and adding pencils as needed. The sculpture exhibits some beautiful symmetry and smells good (if you're a nerd who likes the smell of pencils. Like, for example, me.)
I built this in December of 2016.