Do sparks fly when you pull your jacket off? Do you get a crackling shock when you touch a doorknob? These things happen because you've been collecting electricity! The sparks and crackles are...
Ups and downs
Suppose someone asked you to lift a hippopotamus out of its hippopotamus-sized bathtub! It sounds impossible---but with a simple machine called a pulley, you could do it! A pulley is a special kind...
Where are the horses?
Imagine a team of horses---fifty or a hundred or even more---pulling your car down the highway! Actually, your car's engine has that much pulling power---the pulling power of a certain number of...
A force that pushes and pulls
Magnets can do strange things---that's what makes them such fun to play with. They can stick to each other. They can make nails or pins hang on to each other, like people holding hands. They can even...
Helpful hints
The following information will help you make the projects in this section. If a special skill is needed, the directions will tell you the page on which that skill is explained. For example: "Stitch...
Pulling together
A rowing team is a group of people working together. If each man pulled his oar when he felt like it, the team would never get anywhere---much less win a race. So, like all teams, they have a...
Around and around the sun
The earth doesn't just spin---it also moves through space. Right this very moment, the earth is rushing through space at tremendous speed---more than 66,000 miles (106,000 kilometers) an hour. It...
Why the Bear Has a Stumpy Tail
a Norwegian folk tale by P. C. Asbjbrnsen and J. Moe adapted from the translation by G. W. Dasent One winter day, the Bear met the Fox, who was slinking along with a string of fish he had stolen. ...