MoMA Exclusive: This small version of our best-selling Albert Clock lets you take the math challenge to any room in your home. The battery-operated portable clock displays the design’s famous math equations on an LCD screen. This digital clock encourages intelligent thinking by inviting you to cbattery-operated portable design displays thealculate the time according to six levels of difficulty. (It also includes a non-mathematical setting.) For those days you’re not in the mood for math, you can “cheat” by tapping the top of the clock to view the actual time.  The small Albert Clock is made from ABS plastic with an LCD glass screen and requires two AA batteries (not included). It measures 3.5h x 5.5w x 1.2"d