Got this sketching kit today, but I don't know what the grey cube

An unusually addicting, high-quality desk toy designed to help you focus. Fidget at work, in class, and at home in style. Fidget Cube has six sides. Each side features something to fidget with: Click. Glide. Flip. Breathe. Roll. Spin. Got a Fidget Fever? The only cure is Fidget Cube.

Antsy Labs Zuru Retro Fidget Cube, Black/White

6 Cube Organizer - Brightroom™ : Target

Homfa Standard Bookshelf Bookcase, 6 Tier Tall Bookshelf, Display Shelves Standing Cube Organizer for Living Room, Dark Oak

Skill Challenge: Cubes

4,500 Students to Be Housed in Giant Dorm Cube Without Windows in Rooms

Es Devlin Imagines Worlds That Don't Exist - The New York Times

Alexandria Professional Nappa

13 two-point perspective art ideas – Mont Marte Global

Drawing on the Go – Artist Sketch Tin includes all the sketching supplies you need to start drawing and sketching in an easily transportable metal

ArtSkills Sketch Kit, Art Sets for Adults with Pencil Set and Charcoal Art Supplies, Shading Pencils for Sketching, Charcoal for Drawing, Professional