From Rainbow-Craft cardboard sheet, one square per wind turbine is cut out, 22 x 22 cm in size. Using a ruler, draw two lines across the square from corner to corner so that the centre of the paper is marked precisely. Using the lines drawn, cut Lace to within 2.5 cm of the centre.
For the middle, cut out a paper circle with approx. Ø 3 cm and pierce it in the middle with a needle, leave it pierced on the needle.