Seriously, this is not a trick for an adult. There's so much paper being folded and unfolded, after
the change happens, the immediate reaction from the spectator will be that the original item is in
there somewhere, buried under all that paper.
Don't get me wrong... it's a rather effective
illusion, but after the initial chuckle you'll get, as soon as the spectator thinks about it for a
moment, they know that the first item they saw is in there somewhere.
For a kid, this is a
nice effect. But please don't mistake this for something you'd want to use with grown-ups.