The summary of Don Kenn's work couldn't be said any better than by himself:

I write and direct television shows for kids. I have a set of twins and not much time for anything. But when i have time i draw monsterdrawings on post-it notes... it is a little window into a different world, made on office supplies.

There's an incredible amount of detail in these - particularly considering their just doodles on Post-It Notes.

via Honor Student.