What Is a Kaleidoscope?H ave you ever played with a kaleidoscope? These toys can mesmerize and amaze children—and adults—for hours. As you peer through the eyepiece, you see ever-changing patterns of ...

How Does the Electoral College Work?E very four years, Americans head to the voting booth to cast their votes for their choice for President of the United States. As the election draws near, the news ...

What Is the Color of Fire?D o you love s'mores? Who doesn't, right? All that marshmallowey, chocolatey, and graham-crackery goodness all smooshed together. We're getting hungry right now just thinking ...

What Is the Space-Time Continuum?W hen you read today's Wonder of the Day question, what comes to mind? Do the words "space-time continuum" conjure up thoughts of light sabers from Star Wars and ...

What Is a Rube Goldberg Machine?H ave you ever seen a Rube Goldberg machine in action? You probably have, even if you didn’t know what it was. A Rube Goldberg machine is a that uses a chain reaction ...

Why Is the Liberty Bell Cracked?I n America, there are many symbols that people equate with the concept of freedom. One of the most famous is the Liberty Bell in Philadelphia. Cast in London, England, ...

How Smart Are Vending Machines?O n a hot day, there’s nothing quite like dropping some change into a vending machine and listening as a cold drink makes its way to the exit chute. It’s hard for most ...

Why Do People Keep Pets?D o you have a dog at home? If so, you know that special feeling you get when you arrive home after a long day of school to be greeted with a wagging tail and a few excited ...

What Is Junk Food?A fter a long day of school, you ride the bus home and anxiously anticipate having a snack as soon as you burst through the front door. But what kind of snack will you choose? Will ...

Who Invented Math?W e're sure that more than one student has wished that he could travel back in time and prevent someone from inventing math. Of course, that same wish probably has been made with ...

Why Do the Seasons Change?I t's been a long, cold winter in Wonderopolis, and we've had lots of fun in the snow. But we're looking forward to trading our hats and gloves for shorts and tank tops when ...

Why Are They Called "Ears" of Corn?W e were walking past the Wonderopolis barn the other day when we overheard an interesting conversation between a couple of cows: Bessie: Psst! Molly! Can you keep a ...