Child-like Avatars

I'm working on a training piece that focuses on a conversation between a child and a teacher.  Using the Storyline avatars, I'm able to create everything I need for the teacher.  Unfortunately for the child, simply making the built-in avatar smaller doesn't give it a child-like look (especially the female avatars). 

Can anyone point me in the direction of a set of illustrated child-like avatars?  A Google search has proved fruitless.

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