As a young ones parent or a school teacher you need to plan activities with him for coloring pages. For the most part the parents tend to give those coloring pages to kid to keep him busy. But the fact is that these kids need to get some mental exercise from these coloring pages and it should be construed by the kid as a mundane exercise.
The themes of adult coloring books are usually intricate and centered more around adult images, not your childhood counterparts that included bunnies, super heroes, and farm animals. You would expect to see geometric patterns, psychedelic patterns reminiscent of doodle art type pages, fantasy images including angels, dragons, goddesses and mermaids, and ancient designs of religious and spiritual nature.
Best of all of course are free pages that can be printed out at home any time you like. There is so much variety obtainable that as long as they have their pages and something to color with a child will never get bored. For many children, there is no greater gift they can give to Mom or Dad than a picture they coloured all by themselves. Inside or outside of the lines, any page coloured with love and happiness is a masterpiece.
Sailor Moon (美少女戦士セーラームーン, Bishōjo Senshi Sērā Mūn, originally translated as Pretty Soldier Sailor Moon and later as Pretty Guardian Sailor Moon ) is a Japanese shōjo manga series written and illustrated by Naoko Takeuchi. It was originally serialized in Nakayoshi from 1991 to 1997; the 60 individual chapters were published in 18 tankōbon volumes. The series follows the adventures of a schoolgirl named Usagi Tsukino as she transforms into Sailor Moon to search for a magical artifact, the “Legendary Silver Crystal” (「幻の銀水晶」, Maboroshi no Ginzuishō, lit. “Phantom Silver Crystal”). She leads a diverse group of comrades, the Sailor Soldiers (セーラー戦士, Sērā Senshi) (Sailor Guardians in later editions) as they battle against villains to prevent the theft of the Silver Crystal and the destruction of the Solar System.