put in the barrel and shaken to show it does not come out. the barrel is placed mouth down on the surface. a shell is placed over the barrel with the pea and the shell is moved over to the player to place their finger on top of it, so nothing can get in or out.
the other two shells are pick up and shown to be empty and at the same time both hands are seen to be empty. when the player lifts up everything one by one, the pea is not in the barrel. the pea can turn up in another shell or anywhere you want it too. there 