Learn woodworking skills, basic electronics and soldering as you build a machine that draws on its own using markers and vibration.
Use a 890 mm holesaw in a drill to cut out two wood discs (Fig. A) from the 25 mm x 150 mm cedar.
Draw a centred 60 mm circle on each disc with a compass. This will help you align the holes for the markers.
Sand the edges of the cut discs smooth using 120-grit sandpaper.
Using a mitre or jigsaw and miter box, cross-cut the scrap block to 40 mm long. Spread wood glue on the end-grain of the block, centre between the two discs, and clamp together to dry (Fig. B).
On the top disc, make six equidistant marks on the perimeter of the 60 mm circle you drew. Space the marks about 330-400 mm apart but there’s no need to be exact. Use a drill with a 5,2 mm twist drill bit to make a hole on each mark, passing the bit through the upper and lower discs.
Solder the leads from the vibrating motor to the battery holder. Glue the battery holder and motor to the upper disc with hot glue (Fig. C).
Install the battery, then slip a piece of paper between the battery and the contacts to break the connection.
Insert coloured markers in the holes and hold them in place by looping two rubber bands around them (Fig W D). Remove the paper from under the battery holder and set the bot down on a piece of paper to create your masterpiece.