This is a pretty cool idea.  They present a one page how-to project geared for 5-15 year olds.  They are well illustrated covering a variety of projects.  All of the projects are built and tested to be sure they work.  They are hoping to get a syndication for their efforts teaching kids "Tools of Mass Construction".

They even have videos of some of their projects in use.

One of my favorites is Binary Counting.

View the site at: http://www.howtoons.org/