It has been very windy lately.
Holding a spool of string, being the anchor.
My grandmother has a copy of this book along with several others intended to distract a house full of ten year old kids. Other subjets covered in her library include treehouse building, trap-making, knot-tying, and how to skin snakes. As a boy I tried to build the kite that looks like an eagle, it didn't look like an eagle but it did fly.
*images from Kitecraft and kite tournaments (1914) and Kite Derby day 1957 at the University of Illinois