Color changing toys, games and devices

A method of illuminating a toy object with ultraviolet light to create a colorful light display, the method comprising:

• providing an object having at least one ultraviolet sensitive layer wherein there is a pattern painted on the object in the shape of a face, the face including a mouth region that is covered with the at least one ultraviolet sensitive layer;
• and
• illuminating the at least one ultraviolet sensitive layer with ultraviolet light using at least one light source, the at least one ultraviolet sensitive layer arranged to absorb the ultraviolet light and emit a colored light in response, the at least one ultraviolet sensitive layer, when not exposed to the ultraviolet light, being arranged not to emit the colored light;
• increasing and decreasing the intensity of the ultraviolet light repeatedly, thereby causing the intensity of the emitted colored light to also increase and decrease to create an appearance of motion on the surface of the toy object;
• generating sound at a speaker and synchronizing the sound with changes in the intensity of the emitted colored light;
• illuminating the mouth region with the ultraviolet light, thereby causing the mouth region to glow with the colored light and giving an impression that the mouth is opening;
• not illuminating the mouth region with the ultraviolet light such that the at least one ultraviolet sensitive layer in the mouth region does not emit the colored light, thereby giving an impression that the mouth is closed;
• and
• generating audible speech that is synchronized with the simulated opening and closing of the mouth, thereby giving an impression that the mouth region is producing words.