By Stella Chess, M.D. Parents and children should occasionally spend time apart from each other. Parents should be able to enjoy an evening out, or a few days away from home, free from the demands...
Make a tin-can telephone
Materials > • hammer > > • nails (3 small) > > • thread (heavy duty--- > > 12 feet; 3.6 meters) > > • tin cans (2) This telephone doesn't need electricity to work. A piece of thread carries...
What makes these things work?
When you call a friend on the telephone, your voice doesn't really travel through the wire. Your friend hears a copy of your voice---a copy made by electricity. Inside the mouthpiece of your...
THE PRICELESS JUNKYARD
What ever happened to the first telephone, the first horseless carriage, the first sewing machine, and the first telegraph instrument? You may think, "Who cares, they would only be junk by now."...
To know about our world
a telephone booth in Spain Talking to others on the telephone is one way people communicate. We all have to learn about the world we live in. And we have to learn the skills we need for our way of...