Mental Block by Dan HarlanDan Harlan is arguably one of the most creative magicians on the planet. When he sets his mind to a time tested effect, the result is nothing short of jaw dropping. Forget everything you know about the color vision box because you are about to experience a revolution in remote viewing. Now in a handsome wooden finish, the Color Vision Box becomes one of the most beautiful props in your collection. This is Mental Block by Dan Harlan. Heres what