Gobar Times
Open Forum



What do you love the most about holidays? The fact that there are no rules and regulations? No waking up in the morning, no assembly, no subject periods, and no evaluations? While you revel in your freedom, we give you some fodder to feed your intelligence and creativity.   

A Spectroscope or Rainbow Maker

GOBAR GYAAN: Early spectroscopes used prisms that split the light by refraction — bending light waves as they passed through the glass. Modern spectroscopes often replace the prism with narrow slits called ‘diffraction grating’. The slits spread light into different wavelengths by different amounts, which makes it possible to measure these wavelengths. Substances that emit light produce an emission spectrum. Very hot metals, for example, emit light in all wavelengths and appear ‘white-hot’. On the other hand, gases, when heated, produce light only at certain wavelengths, depending on the type of elements they are made of. Thus, spectroscopes are used to split light into different wavelengths to determine the chemical composition of objects, such as stars and elements.

Furoshiki gift wrap2 books (or any two boxes/gifts)

Learn this traditional Japanese art of using wrapping cloth for your books or gifts. Use Oriental ancestry to make your presents stand out! The cloth, by the way, is called Furoshiki. Materials Needed
Colourful square cloth. The one used here is 75cm in length.

For more interesting ways of saving paper and stopping the plastic menace from spreading, log on to our website www.gobartimes.org! Navigate to our ‘Activity Sheets’ section and have a blast!

Your books are now Furoshiki wrapped!
Furoshiki bag with hoops
Now that you have learnt the art of wrapping without paper, how about making an environment friendly bag that helps you up your style quotient? Materials Needed
Colourful square cloth. The one used here is 75cm in length.
Hold up your Furoshiki bag!
Make a simple ‘put-put’ steam boat!
GOBAR GYAAN: A put-put boat is a toy with a very simple steam engine without moving parts, typically powered by a candle or vegetable oil burner. The name comes from the noise some versions of the boats make. Credit for the first put-put boat is usually given to a Frenchman named Thomas Piot. A put-put boat is powered by a very simple heat engine. This engine consists of a small boiler, which is connected to an exhaust tube. When heat is applied to the boiler, water in the boiler flashes into steam. The expanding steam pushes some of the water in the exhaust tube, propelling the boat forward. The steam then condenses, creating a vacuum which draws water back in through the exhaust tube. The cooled water that is brought back into the boiler is then heated and flashed into steam, and the cycle repeats. This constant flashing and cooling cycle of the engine creates the distinctive ‘put-put’ noise!
• An empty Coke can
• An empty juice tetra pack / carton
• Two straws
• M Seal

1) Take the Coke can and cut off the top and bottom with a pair of scissors to turn it into a flat sheet.

2) Mark out a rectangle, 6 cm wide by 18 cm long, and gently fold it in half.

3) Now, around one half of the folded sheet, mark out a 1 cm boundary on three sides and cut it out to make a shape as shown in the picture.

4) Use the M seal glue to make a long piece (about half a cm). Use this to stick two smaller pieces of the M seal on the outside edges of the smaller half of the shape.

5) Fold and stick the two halves together. Use some more M seal and put it on the edges of the smaller piece. Next, fold the remaining portions of the sheet to make a packet like structure. Use a scale to press down and seal the edges, if needed.

6) Use scissors to cut off the excess tabs to leave one long tab along the bottom.

7) Use the M seal and make a strip (about 1 cm wide) and wrap it first about one of the straw ends and then, the second straw end. Roll and seal till the straws are well packed in a plug of M seal.


8) Push in the plug made of the straws into the gap in the packet made out of the coke can. This packet is the boiler. Add M seal to completely seal the openings in the boiler.

9) With the scissors, cut the bottom tab of the boiler on each side of the straws, fold each flap over and seal again. The boiler is now complete.

10) Test it by dipping it into a bowl of water and gently blowing into the straws. If you see any bubbles leaking, give that area a gentle squeeze to seal it properly.

11) TO MAKE THE BOAT, take an empty juice carton, mark down and draw a line across the middle and cut it in half. To make a cabin, cut the piece with the plastic lid into half and take the bottom half. You can cut out windows to make it look more like a cabin.

12) Now, cut a small hole in the bottom of the boat for the two straws to go through. This should be roughly half-way up the carton and in the middle.

13) Put a thin ring of M seal around the hole on both sides. Take the boiler and pop the two straws through the hole. Fix the straws firmly in place with a strip of tape going across the back of the boat. Then, cut the straws in line with the back of the boat.

14) Now, using a stapler, fix the cabin in place. Make sure the hole through which the straws are passing is properly sealed.

15) Prime the boiler with water to make sure it is working. Take one of the straw offcuts and snip the end. Then poke it into one of the straws at the back of the boat and with a mouthful of clean water, blow into the straw until the water comes out of the other straw in the boat.

The GT team, while working on this activity special got great ideas and activities from Nitika Dial, a researcher by profession who enjoys teaching science through interesting experiments and Bobby Chauhan, a corporate pro who specialises in teaching unique and exciting art forms! Want more stimulating activities? Contact Nitika at www.facebook.com/thewonderlab or write to her at nitika@wonderlab.co.in. Bobby and her works are available at www.facebook.com/simplyart.
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