Print out the paper blade helicopter template using 230 g/m² A4 paper.

Cut the paper along the solid lines.  You need two rectangular shape pieces. (1)

Apply glue stick in the middle of the piece A. (2)

Put the sheet B on the sheet A. (3)

Give a mountain fold along the straight dotted line.  (You can use a ruler edge to give a nice fold.) (4)

Give two valley folds along slant dash-dotted lines. (5)

Give a 1.5 cm long cut at the end of a thin plastic straw.

Pinch the shaded part of the blade with the straw end. (6)

Carefully staple like 7.

Turn the paper blade and the straw.

Adjust the angle between the blade and straw and staple like 8.

Give 2 staples at the end of the each blade like 9.

Gently give a spin to the paper blade helicopter indicated by the arrow above.