There are hundreds of versions of "Think of a Number..." tricks. This one is perfect for Friday 13th. When I used it some years ago, the children wanted to know how it was done, not just to satisfy their curiosity, but so they could share it with their families. The wanted to enjoy using the 'secret'. So there's motivation in the magic.
Of course, simply telling how a number trick works is fine for some children, but for most it is the problem solving opportunities that are important. Read more »