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Roman/Arab numerals conversion disk

This disk converts Roman numerals into Arab numerals and vis versa. Learning Roman numerals is a good way to exercise logic and counting. Even if Roman numerals are no more in use today, they can still be found in our daily lives, on monuments, watch dials, to number book chapters, to date films, ... »
converts, versa, dials, geneva, curious
Note
Difficulté
Durée0h 30 min.
Date11.10.2013
Langue(s)
français english

Catapult

This is a simple catapult model built with some very common objects. This weapon of war was used in Greek and Roman Antiquity as well as in the Middle Ages. It could launch heavy stone bolders through a system of spring and without explosives. This DIYs project is a good way to introduce children to ... »
catapult, weapon, explosives, mechanics
Note
Difficulté
Durée0h 30 min.
Date09.09.2013
Langue(s)
français english

Faraday torch

Building a Faraday torch helps to understand how it is possible to produce electricity from a magnet, a copper coil and a movement.  The same principle is used in most electricity plants. Depending on the plant, the movement is produced by different means (for instance by transferring the ... »
faraday, torch, magnet, coil, transferring
Note
Difficulté
Durée4h 0 min.
Date07.06.2013
Langue(s)

Solar oven in a jar

This DIYs project of a solar oven was part of a contest organised by the Juvene Foundation and the Swiss television (RTS-découvertes) during Summer 2011. The idea was to propose an easy experiment which needed only extremely cheap and easy to find materials and which would encourage children to ... »
experiment, insulating, rays, greenhouse, panels
Note
Difficulté
Durée2h 0 min.
Date07.06.2013
Langue(s)

Lighthouse

This Indian lighthouse DIYs project helps to understand how it is possible to produce electricity from a magnet, a copper coil and a movement. The same principle is used in most electricity plants. Depending on the plant, the movement is produced by different means (for instance by transferring ... »
magnet, coil, transferring, steam, turbines
Note
Difficulté
Durée2h 30 min.
Date31.05.2013
Langue(s)
english français
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