Science is not a chapter to memorise — it is something that happens on your table. 48 experiments and builds, sorted by Std, each with what to do, what you will see, and why it happens.
Six lengths of string, a stopwatch and one graph hand you the strength of Earth's gravity to within a few per cent.
🧰 about 1.5 metres of thin string, a heavy nut or a bunch of keys as the bob, tape and a doorframe or shelf edge…Try it → Science40 min
The kitchen scale reading falls in real time, and the steepness of that fall is the speed of the reaction.
🧰 baking soda, white vinegar and water for dilution, a kitchen scale reading to 1 gram…Try it → Science30 min
The shape of your own recovery curve says more about your fitness than the peak number ever could.
🧰 a phone stopwatch, a low step or sturdy chair, paper and pencil for a results table…Try it → Science40 min
Two measurements on a sheet of paper let you calculate the diameter of the Sun, a million times further away than you can walk.
🧰 two pieces of stiff card, a pin, white paper for a screen…Try it → Science35 min
The egg lifts off the bottom and hangs in mid-water at the exact instant the solution reaches the egg's own density.
🧰 a raw egg, a tall jar, 300 millilitres of water…Try it → Science30 min
Your graph shows the precise saltiness at which life simply stops starting.
🧰 fifty dried green gram or mung seeds, five saucers lined with cotton wool, salt and a kitchen scale…Try it → Technology40 min
A phone's slow-motion mode becomes a laboratory timer accurate to a few thousandths of a second.
🧰 a phone that records slow motion, a measuring tape taped vertically to a wall, a small dense ball…Try it → Technology40 min
One bar chart of letter counts hands you your friend's secret key without a single guess at the message.
🧰 two strips of card to make a cipher wheel, paper and pencil, a passage of about 200 letters you have written yourself…Try it → Engineering40 min
Five beams made from identical sheets of paper differ in strength by more than ten times, purely because of shape.
🧰 five identical A4 sheets, sticky tape, two book stacks as supports…Try it → Engineering40 min
Your own measurements produce the peak at 45 degrees that textbooks simply assert.
🧰 a rubber band and a pencil or straw as a launcher, a paper ball or straw rocket as the projectile, a protractor or a card angle guide…Try it → Maths35 min
Throwing rice at a square of paper without aiming gives you the value of pi.
🧰 a large sheet of paper, a pencil, ruler and a string compass, about 400 rice grains or lentils…Try it → Maths35 min
A tray of dice traces out the same curve as radioactive atoms, half-life included.
🧰 about 100 dice, coins or numbered paper slips, a tray or large box lid, graph paper and a pencil…Try it →Ask Acharya Samayeshwar about any of these ideas — he explains them for your board and Std.
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