Cows

I had an idea of using a cow as one of my characters, just because I figured children would make an association with cows and moons, through the well known nursery rhyme. It seems some other children's writers/illustrators have has this same idea. Children's books such as "goodnight moon", which uses a cow jumping over the moon as one of the dominant characters in the text and illustrations. Although "A trip to the moon does not mention cows, I believe this idea could be visually stimulating for the children IF i get it right. 

http://alumni.colorado.edu/2014/06/23/picture-books-3d/

Here are some Cartoon and realistic images of cows I will use as reference for my cow characters: