Improve your mood with Coloring-for-Adults.com. Coloring page Pretty bird – beautiful anti-stress game for print and online for adults. Coloring an illustration with many elements improves mood, distracting from everyday worries. The resulting charge of positive emotions when coloring will create the necessary internal balance for the whole day. Permission: Creative Commons Attribution-NonCommercial 4.0 License. Artist: Persimmons Studio.