The San Francisco Exploratorium squeezed between the covers of a book! The "pages" reflect, magnify, or grow as you follow the instructions. Seven subjects are covered, including light wave craziness, ouchless physics, and hair dryer science.
It also looks almost exactly like one in the cover of the paper airplane book:
Klutz Book of Paper Airplanes Craft Kit https://a.co/94zUS0G
Turns out Klutz might’ve printed quite a few paper airplane instruction manuals.
