Remember Rubik’s Cube, the compulsively annoying puzzle that captivated thousandsof consumers in the early 1980s?

As part of a quirky direct-mail campaign for Farmers & Mechanics Bank, Baltimore agency Eisner Communications has revised the device with its own twist.

The original cube, conceived by Erno Rubik, a lecturer in the Department of Interior Design at the Academy of Applied Arts and Crafts in Budapest, Hungary, consisted of six colors, one for each side. The goal was to fill each side with the same color.

Eisner’s cube has the requisite six sides, but only one color.

The idea, according to Eisner associate creative director Craig Strydom, is to illustrate how simple it is to deal with the Frederick, Md., client. The puzzle, mailed to small businesses in the mid-Atlantic states, arrives this week in a white box labeled, “Life too complicated?”

“We think it will have a long shelf life, literally, either on a mantel or a prospect’s desk,” said Strydom. “It’s tactile and interactive.”