Outdoor Water Filter - How to Make a Water Filter - The Barrel Filter - excerpt from the book "The Scientific American Boy" by A. ...

How to Make a Simple Water Filter - The Small Filter - - excerpt from the book "The Scientific American Boy" by A. Russell Bond “...

Learn how to make a  Megaphone  -  Cardboard Megaphone - excerpt from the book "The Scientific American Boy" by A. Russell Bond A ...

Why do Boats Float on Water - Do you know why some things float while others sink? It isn't just because of their size or their weight. ...

What to do During a Tornado - Tornado Safety rules  - While different kinds of storms bring different kinds of danger, some basic safety rul...

All storms have two things in common: low atmospheric pressure at the storm’s center, and winds that are created by the flow of air from hig...

One of the most common blood diseases worldwide is anemia, which is characterized by an abnormally low number of red blood cells or low leve...

Blood is produced in the bone marrow, a tissue in the central cavity inside almost all of the bones in the body. In infants, the marrow in m...

Blood is produced in the bone marrow, a tissue in the central cavity inside almost all of the bones in the body. In infants, the marrow in ...

What is Blood Plasma? Plasma consists predominantly of water and salts. The kidneys carefully maintain the salt concentration in plasma be...

Have you ever swum in the sea and accidentally swallowed some sea water? It probably made you gag and cough. Sea water contains a lot of s...

In mountainous regions, a river of ice may flow down a valley. This is called a valley glacier.  A glacier can move at different speeds, ...

What is an ice age? Have you ever tried to make a snowball? Snow is soft and fluffy when it falls from the sky, but when you press it in...

A transformer can make an electric current smaller or larger. As an electric current flows along the wires from a power station, it loses ...

You can make a bulb light up by using two wires to join it to a battery.  The bulb lights up because an electric current is flowing thr...

Do you know how water gets to the faucets on your kitchen sink? It comes through pipes. Pipes let water flow in the direction we want i...

Did you know that light rays can cut through a steel plate?  What sort of light can do this? The answer is laser light. A laser can pr...

What color is the sky?  On a sunny day, the sky looks blue. Sometimes, early in the morning and just before sunset, it may look greenish-...

The first moon landing The most exciting thing astronauts have done so far is to travel to the moon. They went in Apollo spacecraft, thre...

Our eyes are good enough for simple stargazing. But they tell us very little about what the stars are really like. To see the stars more ...

From the earth, we can see six of the other planets in our solar system without a telescope. They look like bright stars, but they change th...

Space Information for Kids - What is a Supernova? Throughout the universe, there are great clouds of gas and dust. These clouds are call...

Interesting Facts About the Sun Every morning the sun rises, bringing light and warmth to our world. It is daytime. The sun rises in the...

Atomic Mass Number - What is Atomic Mass Number? The total number of neutrons and protons in the nucleus (core) of an atom, makes the mass...

Why do we Need Salt - Importance of Salt in Human Body The human body contains about 60 percent water. Many of our organs have an incredib...

Why do people sweat? Let us imagine that our body is one perpetually lit stove. The food that we take is the fuel that burns in our body. ...

Did you know that in ancient Rome ordinary man was expected to live up to 23 years? About a hundred years ago the average life span was 4...

What is a Hormone? Hormones are secreted by the glands of internal secretion, which means that they are excreted in the body. They are al...

What Causes Aging? When do People Stop Growing? The newborn is on average 48-50 cm long. Over the next twenty years, the body length i...

How do we Grow? One feature of the living things is growth. By growth the living being improves its composition and functions. The most...

The Giraffe is one of the rarest of animals, and very few are to be found in captivity. So if you make a giraffe, which is not difficult to ...

The Elephant is one of the oldest forms of animated animals, and is at the same time one of the most popular. Four or five yards of gray cam...

A Pair of Jump Standards are made out of two two-by-fours about eight feet long. After planing them smooth on all sides, measure off two fee...

Authorities claim that the best materials from which to make bows are mulberry, sassafras, Southern cedar, black locust, black walnut, apple...

How to Build a Canoe - Wood and Canvas Canoe Canoeing is a most delightful outdoor sport, and one of the healthiest in which a boy can ind...