There is provided a gaming robot comprising at least one movable joint actuated by a prime mover. The gaming robot comprises a first module comprising first electronic circuitry and a first coupling. The first coupling is connectable to a second coupling on a second module comprising second electronic circuitry to create a mechanical interface between the first module and the second module and an electrical interface between the first module and the second module. The first electronic circuitry is configured to: in response to a connection of the second module to the first module, access via the electrical interface data stored within the second electronic circuitry, said data identifying the second module; and transmit the data to an identification system configured to detect the presence and identification of modules attached to the gaming robot.

An underwater robotic device includes a housing unit, a control unit and a propelling unit. The housing unit includes a base seat and an upper cover in liquid-tight engagement with the base seat. The control unit is disposed within the housing unit and includes a circuit module and a center-of-gravity transferring module which is electronically connected with the circuit module. The center-of-gravity transferring module has a movable weight member and a transfer driving mechanism which drives movement of the weight member so as to vary a position of a center of gravity of the underwater robotic device and to control downward and upward moving directions of the underwater robotic device in the water. The propelling unit is connected with the housing unit and is electronically connected with the control unit to produce a propelling force to move the underwater robotic device forward in the water.

An underwater robotic device includes a housing unit, a control unit and a propelling unit. The housing unit includes a base seat and an upper cover in liquid-tight engagement with the base seat. The control unit is disposed within the housing unit and includes a circuit module and a center-of-gravity transferring module which is electronically connected with the circuit module. The center-of-gravity transferring module has a movable weight member and a transfer driving mechanism which drives movement of the weight member so as to vary a position of a center of gravity of the underwater robotic device and to control downward and upward moving directions of the underwater robotic device in the water. The propelling unit is connected with the housing unit and is electronically connected with the control unit to produce a propelling force to move the underwater robotic device forward in the water.

There is provided a suction-generating toy, comprising a chassis, a fan, a first limb element for pivoting between first and second rotational positions, a first drive motor, a first primary drive wheel, a first auxiliary wheel that is rotatably connected to the first drive motor, and a first linkage element that includes a first end that is connected to an eccentric portion of the first auxiliary wheel such that as the first auxiliary wheel is driven to rotate by the first drive motor, the first end of the first linkage element moves through a first path of motion, and a second end that is coupled to the first limb element such that as the first end moves through the first path of motion, the first linkage element drives the first limb element to pivot between the first and second rotational positions.

A bionic animal includes a shell, a first front foot driving motor, a first front foot rotating shaft, a transmission mechanism, a frame, a second front foot driving motor, a second front foot rotating shaft and a front foot assembly. The shell has a first shaft hole. The first front foot rotating shaft is disposed in the first shaft hole. The transmission mechanism is connected to the first front foot driving motor and the first front foot rotating shaft. The frame is connected to the first front foot rotating shaft. The second front foot driving motor is disposed in the frame. The second front foot rotating shaft is connected to the second front foot driving motor. The front foot assembly is connected to the second front foot rotating shaft.