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 ...

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 ...

Like Dr. Seuss once said, “There are so many things you can learn about, but you’ll miss the best things if you keep your eyes shut.” That’s why, no matter what your age is, you should never stop ...