How do Iake an object touch interactive

In my game objects will be falling out of the sky and when you touch them they are flung back into the air. This game is for itouch. Any idea how to do this . Thank you to anyone who replies

How much of it do you already know? The functions you will need are-

Input.touches

Physics.Raycast

Rigidbody.AddForce

Maybe some others, but just using the examples given in those three pages you should be able to come up with something that works nicely. Do you have it working on the device yet? If not, you will have to emulate the touches using the mouse until you can get it onto an actual iOS device.