I absolutely love this Opus Shelving, designed by Sean Yoo. How fun would it be filled with a bunch of kids' books and accoutrements? It's unconventionally shaped cubbies add so much character to what would otherwise be a basic shelving unit. Apparently, Yoo was inspired by a Roman wall technique called "opus incertum" and then found the same pattern repeated in dried lake beds and broken sidewalks. You wouldn't think that this shelf is super lightweight, made from 100% recyclable polypropylene, and can be stacked or set side-by-side using a strong tape.