A sensory device may include a bottom surface, a perimeter wall extending upward from the bottom surface to a perimeter height and a plurality of projections extending upward from the bottom surface to a projection height. The plurality of projections may include a first set, a second set, and a third set, where projections within a given set have a similar structure to each other but a distinct structure relative to projections in other sets. Projections may be (a) generally cylindrical in shape, (b) disposed in a linear manner, (c) disposed as a plurality of concentric circular segments, or (d) disposed as a plurality of coupled linear segments.

According to various embodiments, a wrist rest is provided. The wrist rest comprises a base structure, a plurality of light sources housed in the base structure and capable of emitting light, a light guide disposed over the plurality of light sources and configured to receive the light emitted from the plurality of light sources and release the light, and a cushion secured to the base structure and disposed over the light guide in a manner so as to conceal the plurality of light sources and the light guide between the base structure and the cushion. The cushion is configured to diffuse the light released from the light guide. Each light source is capable of selectively producing a plurality of lighting colours.