We are starting the Puzzles and Sudoku Series and will be regularly updating puzzles and Sudoku here. Let us start with an easy Sudoku variation called Trio Sudoku. If you love to solve Sudoku, you will find Trio Sudoku quite easy and will love to solve it.
Rules of Trio Sudoku
Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each row, column, and outlined 3x3 box. Additionally, cells with circles must contain digits 1, 2, and 3. Cells with squares must contain 4, 5, and 6. Blank cells must contain the digits 7, 8, and 9.
Trio Sudoku (Puzzles & Sudoku #1)
Trio Sudoku (Puzzles & Sudoku #1)

The solution of Trio Sudoku is given below
Trio Sudoku (Puzzles & Sudoku #1) Solution
Trio Sudoku (Puzzles & Sudoku #1) Solution

Do you know that the air in an average sized room weighs about 50 kg?

Air puts the pressure from all sides, you get the air pressure of the weight equivalent of a small car on your body always!

This is because we are surrounded by air, we call it it our atmosphere. Earth's atmosphere is about 480 kilometers thick, but most of it is within 16 km the surface, it thins out as we move up. The weight of gases in our atmosphere creates the pressure. Air pressure decreases with altitude. At sea level, air pressure is about 1 kilogram per square centimetre  At 10,000 feet (3 km), the air pressure is reduced to 0.7 kg per square cm.

An interesting thing happens when the air pressure changes – things start to move. The cloud move, the wind starts and so on. This difference in pressure that causes movement is what creates winds and tornadoes.
Here are some of the experiments we can do to learn more about pressure.


Water Glass Magic Trick
  1. Take a small size glass of width less than a playing card.
  2. Fill this glass one-third with water. 
  3. Cover the glass with the playing card card and invert (holding the card in place). 
  4. Remove your hand from the card. 
Magic! The card stays in place.

The card experiences about 7 kg of force pushing upward by the air and only about 300g of force pushing downward from the water – hence the card stays in place.

Egg Magic Trick

  1. Take a hard boiled egg and remove the shell
  2. Use a large neck glass mil bottle with a neck large enough that the egg can be squeezed through.
  3. Light some new paper and toss it inside the bottle.
  4. While the paper is burning,  quickly place the egg (small-end down) on the mouth of the bottle. 
Magic! The Egg falls inside.

When you burnt the paper, the air inside gets used up by the flame, lowering the air pressure inside the bottle. The outside higher pressure pushes on the egg and pops it in.
Space Demystified

In 1980, the Voyager probe photographed an unusual phenomenon on the moon Dione. The whole of its trailing hemisphere appeared to be covered with large wispy features, initially christened the "wispy terrain".

At first, it was puzzling as to what these features actually were and scientists put forward various theories to explain them. 
One hypothesis was that shortly after its formation Dione was geologically active, and some process such as cryovolcanism resurfaced much of its surface, with the streaks forming from eruptions along cracks in Dione's surface that fell back to the surface as snow or ash. Later, after the internal activity and resurfacing ceased, cratering continued primarily on the leading hemisphere and wiped out the streak patterns there.

This hypothesis was proven wrong by the Cassini spacecraft flyby of December 13, 2004, which produced close-up images of these things, even though the mission was planned to study Gravity and not the Structure! These revealed that the 'wisps' were, in fact, not ice deposits at all, but rather bright gigantic ice cliffs created by tectonic fractures (chasmata). Dione has been revealed as a world riven by enormous fractures on its trailing hemisphere. A subsequent closer flyby from Cassini was able to image them from a different angle, showing that some of these cliffs are around 200 miles high.


Does Dione Have an Atmosphere?

The Cassini probe comes into its own once again. In 2010, it detected a thin layer of molecular oxygen around the moon. However, it is so extremely tenuous that scientists refuse to call it an actual "atmosphere", preferring the term "exosphere".

Do you know that the light that reaches us today from sun is energy produced maybe millions of years ago!

A photon travels, on average, a small distance, before being briefly absorbed and released by an atom, which scatters it in a new random direction.From the core to the sun’s surface (696,000 kilometers) where it can escape into space, a photon needs to make a huge number of drunken jumps.  

According to the famous 'drunkard's walk' problem, the distance a drunk, making random left and right turns, gets from the lamp post is his typical step size times the square root of the number of steps he takes. For the sun, we know how far we want to go to get out....696,000 kilometers, we just need to know how far a photon travels between emission and absorption, and how long this step takes. This requires a bit of physics!

The interior of the sun is a seathing plasma with a central density of over 100 grams/cc. The atoms, mostly hydrogen, are fully stripped of electrons so that the particle density is 10^26 protons per cubic centimeter. That means that the typical distance between protons or electrons is about (10^26)^1/3 = 2 x 10^-9 centimeters. The actual 'mean free path' for radiation is closer to 1 centimeter after electromagnetic effects are included. Light travels this distance in about 3 x 10^-11 seconds. Very approximately, this means that to travel the radius of the Sun, a photon will have to take (696,000 kilometers/1 centimeter)^2 = 5 x 10^21 steps. This will take, 5x10^21 x 3 x10^-11 = 1.5 x 10^11 seconds or since there are 3.1 x 10^7 seconds in a year, you get about 4,000 years. Some textbooks refer to 'hundreds of thousands of years' or even 'several million years' depending on what is assumed for the mean free patch. Also, the interior of the sun is not at constant density so that the steps taken in the outer half of the sun are much larger than in the deep interior where the densities are highest. Note that if you estimate a value for the mean free path that is a factor of three smaller than 1 centimeter, the time increases a factor of 10!
ScienceInBox Workshops - A Creative Learning Space

Explore the world of Science and Robotics with a series of fun filled activity based workshops, specially designed for Junior Scientists.

We do not Just Teach, we let the kids learn science by doing it themselves. Our workshops include science concepts, puzzles, logical thinking, electronics and lot of fun.

All our workshop contents are custom designed for the group based on Interest, Need and Motivation. We deliver them with Hands-On-Activities, and conclude the learning with our analysis of scientific temper of the child.

Our workshops let kids Enquire, Do-It-Yourself, Observe and Learn the basic concepts in Science and Robotics. 
  • Kids take home the workbooks, working models and scientific instruments to keep inspiring them for further learning.
  • We evaluate the workbooks and provide an individualistic STEM Discovery ReportTM on the strength of the child in science and robotics.
  • Our STEM Discovery ReportTM format has been created by Phd in Education to help you discover the capabilities of your child better.

Meet Our Teachers: Our content is created by Toppers, Scientists, Educationalists and Researchers. We deliver this content with trained and well educated team of teachers in a fun filled environment using the safe and high quality Do-It-Yourself science and robotic kits. 

Come and Join the Fun!

Did you know that the Elephant toothpaste is a foamy substance and often used for classroom demonstrations to make a "volcano of foam". You can learn more such experiments at Science-In-Box experience zone. 

This reaction is sometimes known as the "Marshmallow Experiment". It creates foam that shoots up out of the bottle. After a minute or so, it begins to come out in a moving stream that looks like toothpaste being squeezed out of a tube. 


  1. Mix Concentrated (30%) hydrogen peroxide with liquid soap. 
  2. Add a catalyst, often potassium iodide, to make the hydrogen peroxide decompose very quickly. 
  3. Hydrogen peroxide breaks down into oxygen and water. 
  4. As a small amount of hydrogen peroxide generates a large volume of oxygen, the oxygen quickly pushes out of the container. 
  5. The soapy water traps the oxygen, creating bubbles, and turns into foam.

Chemistry Behind

This experiment shows the catalyzed decomposition of hydrogen peroxide. Hydrogen peroxide (H2O2) decomposes into water and oxygen gas, but normally the reaction is too slow to be easily perceived or measured:
2H2O2 → 2H2O(l) + O2(g)
The iodide ion from potassium iodide acts as a catalyst —it speeds up the reaction without being consumed in the reaction process. The iodide ion changes the mechanism by which the reaction occurs:
H2O2 + I H2O + IO
H2O2 + IO H2O + O2 + I

2H2O2 2H2O(l) + O2(g) ΔrH° = −196 kJ/mol
The reaction is exothermic; the foam produced is hot. Everyone can play with the foam as it is just soap and water with oxygen bubbles. 

Giant Dinosaur

The world's first super massive dinosaur — even larger than seven Tyrannosaurus Rex put together, has been discovered. 

With a 37-foot neck and weighing around 65 tonnes — the 85 feet high Dreadnoughtus schrani has now been confirmed as the largest dinosaur to ever walk the earth. It is the biggest land animal for which a body mass can be accurately calculated.

Prior to the description of the 65-ton Dreadnoughtus schrani specimen, another Patagonian giant, Elaltitan, held the title of dinosaur with the greatest calculable weight at 47 tons. 

Scientific Importance
Scientists have a lot of unanswered questions about how the biggest dinosaurs that ever lived managed to move their enormous bodies on land. With the discovery of the supermassive dinosaur Dreadnoughtus schrani, the most complete skeleton ever found of its type, paleontologists have an unprecedented window into the anatomy and biomechanics of the largest animals to ever walk the Earth.

Tiny dinosaur

The tiny tot, dubbed Mahakala omnogovae, was unearthed in the southern Gobi Desert region in Mongolia.

The dinosaur, a mere 2 feet long (70 centimeters) and weighing the equivalent of two cans of soda, roamed the Earth 80 million years ago during the Cretaceous period (between 146 and 65 million years ago). 

Remains of a petite dinosaur reveal that some of the ancestors of birds had already shrunk in size before flight evolved.