Who doesn't love fun facts!
Trivia and fun facts is so popular there are games for it (Trivial Pursuit and others), and many towns have a trivia Night in a local pub or restaurant.
How about TV shows! Think of Jeapordy.
Trivia is fun and addictive!
The trivia / fun facts market for kids is huge.
The proof? Look at how much money kid trivia books are making. There are entire 6 figure incomes from just having a few trivia books!
The content is pretty similar - just have a dynamite cover!