CHAPTER I
HOME-MADE WINDMILLS
No mechanical toy is more interesting to make, nor more interesting to watch in operation, than a miniature windmill. It is a very simple toy to construct, and the material for making one can usually be found at hand, which are two reasons why nearly every boy and girl at one time or another builds one.
The Paper Pinwheel shown in Fig. 1 is one of the best whirlers ever devised. A slight forward thrust of the stick handle upon which it is mounted starts it in motion, and when you run with the stick extended in front of you it whirls at a merry speed.
Fig. 1.—The Paper Pinwheel is the Simplest Pinwheel to Make.
A piece of paper 8 or 10 inches square is needed for the pinwheel. Fold this piece of paper diagonally from
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