Impress your kids with fun facts that are both age-appropriate and surprising. Did you know that ketchup was once sold as medicine in the 1800s, or that Earth has more trees than stars in our galaxy?

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these ...

Discover 100 Fun Facts That Are Really Fun To Tell! Impress everyone with surprising science, animal oddities, and historical ...

Add Yahoo as a preferred source to see more of our stories on Google. You’ll discover that the world is full of unique and extraordinary things that you never knew about before. And before you know it ...