Good fun trick, it's all in your presentation really. Super easy to make the gimmick (yes you need
to make something but it will take you about 30 seconds) There are some other "things" you can do or
make if you want which are not necessary to make the trick work just might throw off people who try
to analyze or backtrack but if you present well you can get by without even worrying about it
honestly in my opinion. I recommend this trick.