How do you Playing airplane?

If you mean that game when you let somebody fly on your feet, it will works like this:

for the person that push other person in the air:

1. Lay down on your back
2. Let somebody stand in front of you
3. Let him/her lean forward, Place the soles of your feet (it works better with bare feet) on his/her stomach or hips (the best way to place them is to put your heels on the stomach and put your toes outside)
4. Grab each others hand or arms, and pull him/her with your arms a little bit forward
5. Than push him/her with your feet in the air, and keep balance.

For the person that flies:

1. Lean a little bit forward to the person that is laying down.
2. Allow him/her to place his/her feet (prefer to place the heels) on your stomach or hips.
3. Grab each others hands or arms and lean more forward.
4. Than allow the laying person to push you in the air with his/her feet and let your own feet release the ground and keep balance on his/her feet.

It's important to use your feet to push, and your hands to keep balance.