Toys and science, what could be better?

Here is a link for a really interesting book from 1915 called Home-Made Toys for Girls and Boys : wooden and cardboard toys, mechanical and electrical toys. Besides being a piece of history, it's full of really great toy making ideas and from the looks of it, some can be quite useful in explaining some science topics such as pulleys, levers or how wind can be used to generate power for example. This one is for the handy, the semi-handy and the adventurous.    Enjoy!!!