I used to ride in a grocery cart when we shopped for food. Now my folks send me to the store for things they forgot to buy. Today I have to buy oatmeal. I walk down the aisles in the store. I must...
Putting machines to work
Turn the key at the back of the alarm clock once . . . twice . . . three times. At first the key turns easily. But as you keep winding, the key turns harder and harder. Finally the clock is wound as...
Energy from the wind
A push from the wind can make a kite fly and a sailboat glide across the water---and it can do other things, too. It can even light lamps and pump water! If you live in a place where a strong,...
