Take a break from the hustle and bustle with Coloring-for-Adults.com: Grandfather and grandson coloring page – modern drawing for adults to color online or download. The illustration is already filled with emotions and meanings. The artists carefully painted every detail of the plot. You can color according to the suggested pattern or make your own story. Save the created mood for the whole day or a wonderful evening. Inspiration! Permission: Creative Commons Attribution-NonCommercial 4.0 License. Artist: Persimmons Studio.