There is provided an information processing apparatus including an attribute management unit configured to manage a variable attribute value associated with each one or more characters existing in a real space, a detection unit configured to detect an interaction event between a first character and a real object by using an image captured by a camera that captures the real space, and a setting unit configured to set a rule for changing the attribute value of the first character depending on the interaction event. In a case where the detection unit has detected the interaction event, the attribute management unit changes the attribute value of the first character in accordance with the rule set by the setting unit.

A chessboard toy is provided. A first driving coil is arranged on an inner ring of a knob, and a second driving coil is arranged on a rotating member; and the first driving coil and the second driving coil mesh with each other, so that a rotation sensing member can be controlled by direct mechanical transmission; mechanical motion of the knob can be converted into an electrical signal of the rotation sensing member; and use of a light sensing mechanism or a magnetic sensing mechanism is avoided. Therefore, structural complexity and a fault rate are reduced. In addition, compared with the light sensing mechanism and the magnetic sensing mechanism that have high costs, a technical solution can also significantly reduce production and manufacturing costs.