Toddler Magic

My son Alex did his first magic trick the other day-- he took a penny, showed it to me, and then placed it behind his back and asked me to guess which hand it was in; I guessed his right hand, but he opened his palm and it wasn't there, and then I said, "Okay it's in your left hand"-- and then I heard the sound of a coin falling onto the wood floor-- and then he opened his left hand . . . and it was empty: magic!