You need to carefully pour a viscous liquid (e.g. oil paint) from banks in a narrow-necked container or to fill in the gaps with the heated tar or mastic? Here you will rescue this type of nozzle, made of half cap from the same banks, tightly inserted in holes on the tube spout.
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FLUX PENCIL
When finished, do not rush to sweep away the iron filings: putting them on paper with the help of the charge from the back of the magnet and adding rosin, it is possible to make flux for...
THE SIMPLEST FLASHLIGHT
Yes, it's probably easier to not think. For the manufacture of such "Firefly" will need only a flat battery, the light bulb is 3.5 V and the two rubber rings or a bit of adhesive tape....
