This is an easy trick that makes it look like you're moving a coin from your left hand to your right, and then making it disappear in your right hand. In reality, you'll keep the coin in your left hand the whole time while tricking your audience into thinking you moved it. Here's how you do it:
Hold the coin between the thumb and first two fingers of your left hand.
Move your right hand towards the left, pretending to reach down to pick it up with your three middle fingers, while really letting it "drop" into the left hand.
Pretend that you're holding it between the index finger and thumb of your right hand.
Blow on "the coin" and open up your right hand, showing that it has disappeared.
Reach your left hand toward your elbow and reveal the coin, making it look like that was where you made it disappear.