Take a piece of PVC pipe. Cut of three pieces of 20 cm using for example a pipe cutter to get great straight cuts.
Prepare the three pieces of PVC pipe for drilling and sawing. Draw a straight line from one of the pipes ends to the middle of the pipe. Mark the middle of the pipe on the line drawn. Repeat this for the other two pipes.
Drill a3.5 mm hole in the middle of pipe. Repeat this for the other two pipes.
Take a small saw and make a cut along the line until you reach the hole drilled in the previous step Repeat this for the other two pipes..
Take a piece of sanding paper and remove the rough edges form the cut made in the previous step. Repeat this for the other two pipes.
The rest of this workshop shop is still under construction. New content will be added in the coming weeks.