Art Alternatives Ravenna Sketch Box Easel, Natural. Form, function and beauty combine in the Ravenna Sketch Box Easel. You'll never be hindered by a lack of space with this studio in a box; this tabletop easel unfolds for use on any steady surface and locks up snugly for travel. An easily accessible side drawer with four compartments holds all your supplies. A carrying handle and clasps makes transport hassle-free.