A skateboard has a board that is rotatably provided with a front wheel and
rear wheel. Disposed on the both sides of the board are speakers. On the
front wheel there is provided a steering angle sensor, while on the rear
wheel there is provided a rotational speed sensor in order to sense the
traveling direction and traveling speed of the skateboard. A control box
disposed on the undersurface of the board is equipped with a computer
device and tone generator. The computer device controls, in accordance
with the traveling direction and speed of the skateboard, the performance
tempo of automatic rhythm and automatic performance, the switching
between automatic rhythm patterns, and the generation of musical tone
signals. The present invention brings more fun to a player without making
the player tired by adding variation to music to which the player listens
during the ride on the moving apparatus in accordance with the movement
of the moving apparatus.