I have a mentalism I purchased years ago. It is a blackboard divided into 6 squares. Have people think of things and you read their minds and write what you recieve in the upper squares and then cover up the squares. You then have then reveal what they were thinking of and you erite them down in the lower squares. Upon removing the covers from the upper squares, it is seen that what you "read" matches what is below. I have great success with this. I believe it is called Mental Epic . Great Trick. Worth the investment.