Howtoons

http://www.howtoons.org/

From the intro to the site:

What and why are Howtoons?

Howtoons are one-page cartoons showing 5-to-15 year-old kids "How To" build things. Each illustrated episode is a stand-alone fun adventure accessible to all, including the pre-literate. Our Howtoons are designed to encourage children to be active participants in discovering the world through Play-that-Matters -- fun, creative, and inventive -- and to rely a lot less on mass-consumable entertainment.