Yes, even the tiny user-interface details of LEGO bricks are given a lot of thought and consideration by the Danish toy maker. The result is good user-experience (UX) design of the control panels and screens painted on 52 of their bricks.

This article by George Cave is an excellent and fascinating look at the design of control panels in general and explains how LEGO reflects this in the attention to detail in their control-panel bricks.

BTW We love LEGOs and all the non-obvious ways these can be creatively used in ways the company perhaps never intended or imagined.