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 ...

Spark curiosity with 27 exciting at-home science projects for kids! Fun, easy activities that teach science while keeping them happily busy. Teaching and keeping kids entertained simultaneously isn't ...

There's a whole world of home science projects beyond the vinegar and baking soda volcano. Credit: peopleimages via Getty Images The vinegar and baking soda volcano is a science fair classic, but ...

Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these fun facts about life, history, food, and more. Although “fun” is in the name, don’t be fooled.