13. Apparatus comprising at least one physical computer-readable storage medium having stored thereon computer-executable instructions that, when loaded into processor hardware and executed, transform the processor hardware to perform the following: receive an indication of at least one stimulation level calculated for at least one of a plurality of cells defined by a software-implemented non-linguistic user interface, wherein the cells are associated with respective physical regions of a hardware substrate, wherein the stimulation level is calculated based on at least one non-linguistic action directed to the hardware substrate by at least one user; and update at least one visible characteristic of the non-linguistic user interface in response to the calculated stimulation level.
13. Apparatus comprising at least one physical computer-readable storage medium having stored thereon computer-executable instructions that, when loaded into processor hardware and executed, transform the processor hardware to perform the following: receive an indication of at least one stimulation level calculated for at least one of a plurality of cells defined by a software-implemented non-linguistic user interface, wherein the cells are associated with respective physical regions of a hardware substrate, wherein the stimulation level is calculated based on at least one non-linguistic action directed to the hardware substrate by at least one user; and update at least one visible characteristic of the non-linguistic user interface in response to the calculated stimulation level. 14. The apparatus of claim 13 , further comprising instructions to receive at least one indication of a temperature level calculated for at least one of the plurality of cells, wherein the temperature level is calculated based on a dwell duration associated with the non-linguistic action.