Here's what to do:

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  What you need

  • 4 felt-tip pens
  • Sticky tape or double sided tape
  • Electrical tape or parcel tape
  • 1-2 sheets of corrugated cardboard or an old cardboard box
  • 1 pencil
  • 1 pair of scissors
  • 1.5–3 volt small DC motor (with or without a cog)
  • A switched battery box with leads, that holds 2 AAA batteries
  • 2 AAA batteries
  • A few different weights for your motor (try a 5p coin, a wooden lollipop stick or a small plastic toy)

  Electrical components available from Maplin and other good electrical stores.

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  1. Cut out two triangles

  Take a sheet of cardboard. Draw and cut out two equally-sized triangles, with all the sides of the same length. Use the template here to guide you.

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  2. Slot the triangles together

  On one triangle, cut a slot at the mid point along one side – cut a slot from the bottom of the triangle towards the point, cutting about half way up. On the other triangle, cut from the point of the triangle to about half way down. Slot the two triangle pieces together. This will form the base of your sculpture.

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  3. Add more shapes to your sculpture

  Draw and cut out some shapes using the rest of the cardboard, inspired by David Smith’s sculptures. Try triangles, square frames or circles. Be as creative as you can! Attach these shapes to your sculpture base using glue, tape or by cutting slots.

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  4. Attach the felt-tips to the cup

  Turn your paper cup upside-down so the base is in the air. Attach four felt-tip pens (with the tips facing down) to the outside edge of your cup at equal points, using separate pieces of sticky tape.

  Make sure all the pens are at the same height so that the cup can stand up and is stable. Position them so that they start halfway down the cup. Try to make sure you get the pens in the right position, as you will have to reinforce with more tape later.

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  5. Attach your sculpture to the cup

  Using sticky tape, attach your sculpture securely to the top of your cup, so the pens are holding up the sculpture-bot. Make sure that the pens are secure by adding a new piece of tape that goes all the way around.

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  6. Connect the motor to the battery pack

  Now, take the battery pack and hook the metal tip of the black negative wire to one side of the connector on the motor. Repeat with the red positive wire to the opposite connector and twist it. Make sure the wires are securely attached to each side of the connector.

  Use electrical tape or sellotape to ensure that the metal parts stay connected when the robot moves. The metal part of the wire must touch the metal connector on the motor to allow the electric current to flow. Then, place the batteries in the battery pack, turn it on and test that the motor works.

  Warning: Be careful not to attach the two wires to the same side of the motor as this will cause your batteries to overheat.

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  7. Attach your battery and motor

  Attach the battery pack to one side of your sculpture-bot using electrical, sticky or double-sided tape. Securely attach your motor the top of the cup, on the opposite side to the battery pack. The rotating pin on the motor should face outwards, and stick out more than the sculpture.

  Make sure there is plenty of room around the pin of your motor, ready for when you attach a weight. It shouldn’t hit the top of your sculpture, or come into contact with anything else when it spins. Check the wires are still securely connected to your motor. If necessary, add more tape!

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  8. Attach a weight to the motor

  Start by using a 5p coin as your weight. If your motor has a cog provided, put the cog on the end of the pin. Fix your 5p coin on one end of the lollipop stick. Then fix the lollipop to the cog. Make sure it is secure.

  If your motor doesn’t have a wheel, to add a weight, cut a thin strip of electrical or sticky tape and loop this around the pin of the motor, and seal it firmly. It should be well fixed, so that when the motor spins, it stays attached. Attach the 5p coin as your weight by sticking it to the tape flap with some more tape.

  Warning: Be careful when you are attaching weights to the motor as they could loosen and cause injury if you don’t fasten them securely.

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  9. Get ready to draw

  Place your drawing sculpture-bot on a big piece of paper. If you don’t have a very big piece of paper, it might be a good idea to put newspaper under the paper in case sculpture-bot goes over the edges. Remove the lids from the felt-tips and position your sculpture-bot in the centre of the paper.

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  10. Watch the sculpture-bot draw

  Switch the battery pack on and watch the sculpture-bot create a drawing!

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  11. Experiment!

  Experiment with adding different weights of different sizes to your motor, using tape. See what differences there are in the marks it makes. You can even try changing the pens, as the colours and thicknesses will change how your finished drawing looks.