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Stable spin. Stick a pencil point through a card cut-out of an...
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Exploring the way in which an aircraft's autopilot works.
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Hold the pencil in one hand with the blades above and pull the...
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The steering mechanism of a car converts a driver's hand movem...
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Cut two slots w and 5 mm apart into each piece B. Each slot i...
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Using double-sided tape, stick nine magnets along the centre o...
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Tape the edges of the rail C between the slots on the sides A,...
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Stick the spavers D together. Glue them to the middle of the t...
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Stick the mountboard sides F to the train base so that the mag...
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Modelling clay, rectangular magnets, polyboard, pencil, double...
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Add a train top to the base. Place the train on top of the rai...
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Glass, jug of water, cutting surface, sheet of paper, craft kn...
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Make a slit across the middle of the straw. Tape the paper upr...
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Blow through the straw, bending it at various angles, until a ...
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Woman drill a hole through the cotton reel, slightly offset fr...
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Cover the bolt shaft with tape to make it smooth, leaving spac...
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Screw the cotton reel to one end of the base so that it turns ...
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Attach an 8 cm length of elastic band to the second screw. Tie...
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Make sure that the bolt protrudes by equal amounts from each s...
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Relax your grip on the string and allow the elastic to pull th...
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