Digital watercolour illustrations -- 2

I am creating some resources for use with children and would like to add watercolour illustrations to the design. I am looking to create 4 simple circle shape 'characters' to represent emotion. Each 'character' would be similar in design, however the colour and expression for each would differ slightly. For each character I would require 8-10 different images, where small details would be added to show actions and thoughts. The details would be simple changes in expressions, or words/colours added around the original character. If this sounds like something you could offer, please get in touch!