Digital painting or color by number painting is a type of painting that is sketched and processed by computer. The lines of the painting are complete and divided into many numbered layouts corresponding to the numbers on the attached color chart. The painting is usually printed on canvas, stretched on a wooden frame, just need to color each number in turn to complete a vivid, aesthetic painting. The method is simple, so this hobby does not require the player to be too skillful. The popular painting sizes are usually 20 x 20, 30 x 40, 40 x 50 cm. The themes that most young people love are comic book characters, cartoons or landscape paintings... The acrylic color material is pre-mixed, has high coverage, is less likely to fade, and is waterproof. Manufacturers are increasingly bringing a variety of models, depending on the size, the painting usually costs from a few dozen to about 100,000 VND. This trend is not too new but always has a certain attraction for young people, especially weekends and holidays are always the ideal time to immerse yourself in digital paintings.