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Hold the edge of the paper flat between your fingers and thumb...
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Now curve the sheet upwards slightly. In addition to supportin...
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Draw the pattern enlarged on to a stiff paper sheet. Using th...
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Turn the sheet over. Now fold upwards along the diagonal lines...
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Pinch together all the folds along one short edge of the paper...
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Glue two stacks of tongue depressors 15 cm apart on the base. ...
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Tie cotton between the ends of two pencils so that they are 5 ...
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Carefully place books one by one on top of the frame.
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Piece of blue paper for the pattern.
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Scissors, cotton, pencils, wooden tongue depressors, wooden ba...
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12V solenoid with plunger, battery connector, pliers, polyboar...
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Push the legs of the LED and the resistor through a polyboard ...
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Tape the horizontal part of the paperclip to the base, then co...
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Mount the solenoid on a frame of squares so that the plunger s...
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Pull the solenoid plunger out until it touches the paperclip c...
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Simulate a fault by short-circuiting the LED. Connect the expo...
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Cut the top from a plastic bottle using a craft knife. The top...
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Cut and discard the neck from a bottle to make a supply tank. ...
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Cut the neck from a long balloon to make a rubber tube. Slide ...
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Use the 3 mm drill bit to make a hole through the dowel, 5 mm ...
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