PaperCopter

Take a square piece of paper (or a standard letter size paper and cut off a bit to make it square) and fold it.

Then take your scissors and cut along the dotted line. When you unfold the paper again you should have a "T" shape.

We need 3 more little cuts. Don't make them too deep or your paper copter will fall apart.

To finish the rotor, fold one of the top parts back 90°, the other one forward. On the 'body', fold both the left and the right part inwards and attach a paper clip to the bottom.

Your paper copter should now look like this:

OK, ready to take off. Hold it up as high as you can with the paper clip facing downwards and just let it go! It should gently fly to the ground. While rotating of course!