I don't know who designed this model, but I like to show it here. Maybe there isn't an official
designer for this model. When you drop this thing, it starts to rotate.
Step
1:Take a rectangular piece of paper.
Use a thin piece of paper, otherwise it will drop to fast.
Make cuts over the pink lines.
Step 2:
Make a valley-fold over the 2 pink lines.
Step 3:
Pull the 2 ends apart (see arrows). Make folds
over the pink line while you do this.
Step 4:
Push a large paper-clip over the bottom of the model,
see arrow. This is to make the bottom a bit heavier.
Use a smaller paper-clip when you'r making a very
small model.
The helicopter is ready!
