Electronic toy receives control information via an input interface and stores the received control information in memory. The electronic toy includes at least one sensor for detecting an external stimulus applied to the toy, and control information is read out from the memory in response to an external stimulus detection signal generated by the sensor so that the electronic toy is controlled to perform a predetermined operation in accordance with the read-out control information. It is possible to readily renew operations that can be performed by the electronic toy, by, for example, downloading desired control information from a server via a communication line and then storing the desired control information in an internal memory of the toy.