Literary Detective: On The Trail Of Invisible Ink
Interesting Issues Related To Life / Culture
Weekend Edition literary detective Paul Collins looked into the origins of Yes & Know children's books. They're filled with games and trivia partially printed in invisible ink. Along the way, he found a link to behaviorist B.F. Skinner, as well a new way the technology is being used.
Source: NPR Topics: Arts & Life
That's pretty neat. I always wanted invisible ink. I've heard it can be made from urine, but I'm sure I'll never try to make it myself. Those little booklets seem like a positive way to keep kids entertained and using their brains. I have always word searches and tic tac toe.