Suppose that one hot summer afternoon you decide to go into business selling glasses of cool lemonade to thirsty people. It would be fun, of course, but you would probably also hope to make some...
Lemon power
You can put your own \"package" of chemicals together to make a battery. A tiny magnet---a compass needle---will show you when the electric current is flowing. Ask a grown-up to use the knife to...
Little blocks of water
Why does lemonade get cooler when you put ice cubes in it? The answer may surprise you. The lemonade cools down because it heats up the ice! Ice cubes are a solid---little blocks of frozen water....
Independence Day
by Laura Ingalls Wilder In this story, taken from the book Farmer Boy, young Almanzo Wilder enjoys the Fourth of July as it was celebrated in northern New York more than a hundred years ago. Almanzo...