Wireless Whiteboard Package:Full set- Whiteboard + Receiver + Magnetic Eraser and ask them to think

and ask them to think of any number (or name

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

I just played with this

Technical details:

Wireless Whiteboard Package:Full set- Whiteboard + Receiver + Magnetic Eraser and ask them to thinkA 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