This very book, "Ninja Monsters Kids Coloring Book: Children Activity Book for Boys, with Fun Coloring Pages of Many Ninja Monster & Ninja Warrior Characters, both Heroes & Villains, in Lots of Super Cool Actions!", would make a perfect gift for boys of any ages who are fond of ninjas or are a big fan of monsters'. The book is packed with fine line arts of super cool ninja warriors and some mutant ninja monsters, both fierce villains and friendly heroes, such as a beaver ninja, a three-eyed monster ninja, a ginger bread ninja, pacman ghost ninjas, and yes, a ninja dino! "Ninja Monsters Kids Coloring Book" would be sure to please your little ones, keep them entertained while exercising their limitless creativity, for their love of ninjas, monsters, and especially both!