Here's the final result :
Step 1: What you will need to make the helicopters
-and a ruler
Step 2: Tracing
1-Trace a line every 6 cm longways (see pict.1), the last section is a bit shorter (about 5.6cm).
2-Trace a vertical line from the top edge to the middle of each column. see pict.2
3-Trace 2 rectangles in each column, 2cm wide x 8cm high, on the side opposite the line traced on step 2 (1.8cm wide x 8cm high for the small column). see pict.3.
That's all the tracing done, let's move on to the next step.
Step 3: Cutting
The lines with a little x and highlighted in green are the ones to cut. see picture1
Then you'll have five parts like this. see pict.2.
let's move on to folding which is the final step!!!
Step 4: The final step-Folding
Fold the paper along the yellow lines BUT where the yellow line splits the piece of paper into 2, fold one flap forwards and the other one backwards. see pict 1, pict.2 and pict.3(side view).
Fold the bottom flap up 1cm and paperclip it to hold it. see pict.4.
Then let it go out of a window or anywhere high up to see it spin like a helicopter.
Hope you like it.