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Third stroke (power stroke. When the piston is at the top of t...
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Fourth stroke (exhaust stroke). The rotating flywheel forces t...
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2 jar lids, marbles, hand-held fan, ruler, safety goggles, sci...
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1). Put a single layer of marbles in the small lid and stick i...
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2). Attach the fan to one end of the ruler with modelling clay...
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3). Hold the fan firmly, switch it on, then let go. As the bla...
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Three 45 cm lengths of insulated copper wire, adhesive tape, 2...
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1). Attach a foil square to one end of each wire by folding th...
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2). Attach the wire without foil and a wire with foil to the p...
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3). Tape the third wire between the beakers or cells as shown ...
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4). Dissolve two teaspoons of salt in warm water, then pour it...
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Cut the base and the vertical supporters from polyboard follow...
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Glue the straw and two smaller rectangles between the two roto...
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Wind the wire about 30 times around the slot in the rotor. Lea...
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Stick two patches of double-sided tape to the cotton reel. Sep...
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Polyboard, thin insulated wire, strong magnets, aluminium foil...
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Assemble the rotor on to the base, pushing the knitting needle...
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Mount the magnets on polyboard blocks so that they align with ...
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Bend two paperclips into L-shapes. Attach a 20 cm length of wi...
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Connect the remaining end of wire to a third paperclip. Keep t...
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