― Jim Henson
I agree with Henson -- many of the folks I most admire are just big, playful kids. Henson (of the Muppets), Theodor Geisel (aka Dr. Seuss), Carl Barks (Uncle Scrooge, Donald Duck, Huey, Dewey and Louie), Stan Lee (Marvel Comics) are a few of favorite artists/kids.
My coloring book is aimed at kids. It's aimed at adults too. At least I hope there's a lot of adults like myself that like kid stuff.
I try to give info on the conic sections is a visual, accessible manner as well as have some fun. Here's some of the pages:
It is available at Amazon.com: Conic Sections & Celestial Mechanics Coloring Book by Hop David.
My other coloring books can be found on my Amazon author's page.