A two wheeled throwable robot for receiving accessories, the robot comprising: an elongate body portion, the body portion having a top side (30.3), a bottom side (30.4), a forward side (30.1), a rearward side (30.2), and a pair of opposite ends; a pair of motorized wheels (24, 26) mounted on each of the opposite ends of the body portion, each of the wheels (24, 26) having a undeflected diameter, and being deflectable upon impact with a surface when the robot is thrown to a deflected diameter, wherein the deflected diameter defines a cylindrical envelope, and wherein the space between the body portion and the cylindrical envelope defines an annular accessory mounting space; and a rearwardly extending tail attached to the body portion at the rearward side (30.2) intermediate the pair of opposite ends; wherein, the body portion comprising a chassis with at two chassis portions, the at least two chassis portions assembled together defining a sealed chassis interior, the body portion further comprising at least one motor, a circuit board with processing circuitry, and a battery mounted in the chassis interior, the body portion further comprising a forwardly directed camera; wherein the chassis has an exterior chassis surface providing the forward facing side, the top side (30.3), the bottom side (30.4), and the rearward side (30.2), characterized in that at least one of the sides provides at least one accessory mounting interface (62, 63) comprising a projection having a landing projecting from the side, the landing with a planar landing surface and a matrixical arrangement of a plurality of threaded holes therein, each of the plurality of threaded holes extending from the planar landing surface but not to the interior of the chassis, the matrixical arrangement extending at least most of a distance between the pair of motorized drive wheels (24, 26), the landing having at least one of a) a plurality of landing sidewalls connecting to the planar landing surface, and b) a plurality of recesses within the planar landing surface. an elongate body portion, the body portion having a top side (30.3), a bottom side (30.4), a forward side (30.1), a rearward side (30.2), and a pair of opposite ends; a pair of motorized wheels (24, 26) mounted on each of the opposite ends of the body portion, each of the wheels (24, 26) having a undeflected diameter, and being deflectable upon impact with a surface when the robot is thrown to a deflected diameter, wherein the deflected diameter defines a cylindrical envelope, and wherein the space between the body portion and the cylindrical envelope defines an annular accessory mounting space; and a rearwardly extending tail attached to the body portion at the rearward side (30.2) intermediate the pair of opposite ends; wherein, the body portion comprising a chassis with at two chassis portions, the at least two chassis portions assembled together defining a sealed chassis interior, the body portion further comprising at least one motor, a circuit board with processing circuitry, and a battery mounted in the chassis interior, the body portion further comprising a forwardly directed camera; wherein the chassis has an exterior chassis surface providing the forward facing side, the top side (30.3), the bottom side (30.4), and the rearward side (30.2), characterized in that at least one of the sides provides at least one accessory mounting interface (62, 63) comprising a projection having a landing projecting from the side, the landing with a planar landing surface and a matrixical arrangement of a plurality of threaded holes therein, each of the plurality of threaded holes extending from the planar landing surface but not to the interior of the chassis, the matrixical arrangement extending at least most of a distance between the pair of motorized drive wheels (24, 26), the landing having at least one of a) a plurality of landing sidewalls connecting to the planar landing surface, and b) a plurality of recesses within the planar landing surface.