Wireless Whiteboard Package:Full set- Whiteboard + Receiver + Magnetic Eraser They can even hold two

They can even hold two cups simultaneously — and you’ll still know precisely which ones they’re touching

Questions and Answers:

I just played with this

Every time they erase a name the magician reveals which name they chose

Any mentalist with a brain in his head can device a variety of themed effects based in this principle

Wireless Whiteboard Package:Full set- Whiteboard + Receiver + Magnetic Eraser They can even hold twoA perfectly innocent looking whiteboard. There is absolutely no visual clue that it communicates with a miniature receiver that sends you an indication the moment that a written item is erased. The volunteer writes up to 5 names, or countries, favorite restaurant, dishes etc. on the board. You can stand up to 50 meters away and even be blindfolded yet you miraculously know each item as it's erased. The board has 2 sides, so you can work simultaneously