Illuminable Building block

An illuminable building block comprising:

• a cell body, having an accommodating space, and including a first surface and a second surface;
• at least one circuit board, disposed in the accommodating space and close to the first surface, the circuit board including an internal surface and an external surface, the external surface being closer to the first surface than to the internal surface;
• at least one illuminating device, disposed on the internal surface of the circuit board;
• at least one photo sensing device, disposed on the external surface of the circuit board, the at least one photo sensing device corresponding to the at least one illuminating device;
• at least one circuit control module, disposed on the circuit board and electrically connected with the at least one illuminating device and the at least one photo sensing device, for controlling the on/off status of the illuminating device corresponding to each photo sensing device;
• and
• at least one assembly portion, disposed on the surface of the cell body.