World-Themed Kids Coloring Book Series

I'm looking for a talented illustrator to create a series of 7 coloring books for kids aged 2 to 8. Each book with 32pages, will feature big, simple images representing elements from different parts of the world.

Each book should focus on one of the following regions:
- Asia
- Africa
- North America
- South America
- Antarctica
- Australia (Oceania)
- Europe

Requirements:
- Age-appropriate, engaging illustrations
- Big, simple images
- Accurate representation of regional elements

Ideal skills and experience:
- Children's book illustration
- Understanding of cultural elements
- Experience with age-appropriate designs

Please provide samples of similar work.