Cartoon or Coloring Book Illustrations Needed for Children's Story

I'm creating some children's stories that teach foreign languages. My first story will need 14 illustrations. For this bid, I would like to see two samples of your work for the each of the first two pages of the book. The first page is: "Adam and Sarah are good friends." Picture should be a boy and a girl approximately ages 6. The second page is: "Adam likes to play with his bid red ball." Picture should be a boy catching, throwing, or kicking a large ball (the ball should be a 12 to 18 inches in diameter in relation to the size of the boy). I am hoping for the simples line drawings, least expensive possible - color not required, but acceptable. I would like two illustrations for each page, one for a coloring book style, and one as just a normal cartoon style illustration. If I like the work, there could be many more similar projects. Please post links to any children's illustrations you have done before.