Photo-chromic light drawing sets

A photo-chromic light drawing playset comprising:

• a substrate;
• one or more layers of different colored photo-chromic ink applied to a surface of the substrate in a pattern of parallel arcs;
• a light pen to selectively activate a portion of the one or more layers of different colored photo-chromic ink to display a portion of the pattern of parallel arcs as a colored rainbow;
• and
• wherein the activated portion of the one or more layers of photo-chromic ink is temporarily transformed to display the one or more layers of different colored photo-chromic for a period of time before gradually decaying back to an inactive state.

A photo-chromic light drawing set comprising:

• a drawing board including
• a substrate, and
• a photo-chromic layer of ink applied onto a surface of the substrate;
• a light marker including a plurality of ultraviolet light sources, the light marker to activate a large area of the photo-chromic layer of ink for each stroke of the light marker over the drawing board;
• and
• wherein the activated area of the photo-chromic layer of ink is temporarily transformed from a first color to a second color differing from the first color for a period of time before gradually decaying back to the first color.