Hi-ya,
Okay, Ready to start working on your project kids book illustrations Similar to wheres wally books.,will design according to your description that "kids book illustrations depicting dozens or more people doing a variety of amusing things at a given......" so on
I am skillful graphics designer with skills including Graphic Design, Illustration, Book Artist, Drawing and Caricature & Cartoons.
Here is the link to my portfolio and profile to let you have an idea of my expertise:
https://www.freelancer.com/u/LetsDezign.html
what should be the size of it ?
You can send me a message so that we may discuss more.
Yours truly
Letsdezign