Howtoons -- the comic strip for kids that explains how to build cool stuff -- has just launched on the Web. The artwork is great and the projects are interesting. While perusing the site, I came across this great cartoon that illustrates wind strengths on the Beaufort scale. When I was sailing Optimists as a kid in England we used to refer to wind strength using the Beaufort scale instead of using knots. No one seems to use it in the US, but I always liked it because it is based on observations which are easy to differentiate, rather than wind speeds which are hard to judge. For example, the difference between a Force 3 and a Force 4 is that white caps have started to form.