Children still believe something which is non sense or out of mind such as becoming super hero or believing in fairy. That is why they completely prefer to watch cartoon where animals can talk or there is a fairy in everyday life. Having awesome power becomes more interesting than wishing having more money for children.
Watching cartoon has huge effect for them but imagination contributes important role as the means to develop their intelligence. There are many cartoon movies that children can watch. This is also can be used for parent or teacher to let them sharpen their ability including through coloring activity. Super Sonic is one of cartoon movie that public has. When children like this figure, parent can use sonic coloring in pages to interest children in learning about colors. There are many characters which are presence including Sonic and his friends. It might be no problem when children paint this character with other color than blue.
Most of the feature will have blue color and acute angle especially in hair part. There will be no right or wrong coloring that children will have but it teaches children about making feature complete and recognizing part of the body through the character.