From the shadow box pieces, Bell moved on to begin what is perhaps his most recognizable body of work, namely cube sculptures that rest on transparent pedestals. Bell first started constructing these pieces in the early ‘60s. The earliest examples frequently featured "the systematic use of modular internal divisions (ellipses, parallelograms, checker and hexagonal arrangements)", and used a variety of materials including formica, brass, and wood. Three of these works were included in the seminal 1966 exhibit, "Primary Structures" at the Jewish Museum in New York.