Doodling and scribbling are most often associated with young children and toddlers, because their lack of hand–eye coordination and lower mental development often make it very difficult for any young child to keep their coloring attempts within the line art of the subject. Despite this, it is not uncommon to see such behaviour with adults, in which case it generally is done jovially, out of boredom.
Typical examples of doodling are found in school notebooks, often in the margins, drawn by students daydreaming or losing interest during class. Other common examples of doodling are produced during long telephone conversations if a pen and paper are available.
Popular kinds of doodles include cartoon versions of teachers or companions in a school, famous TV or comic characters, invented fictional beings, landscapes, geometric shapes, patterns and textures.