To provide a moving body toy capable of performing different control depending on reading directions even with the same read information.

A running environment determination program of the moving body toy whose operations are controlled by optical read information provided in the middle of movement constituted of data strings, makes a computer function as: a means for inputting the optical read information to be scanned during running of the moving body toy; a means for detecting a reading order of the data strings in the input optical read information; a means for extracting running environment information corresponding to the order of data strings stored by being associated with the optical read information based on the detected order of reading data strings; and a means for controlling the operations of the moving body toy by the extracted running environment information.