WHITPAIN >> Oz Pearlman is a mentalist, not a magician.What's the difference?According to Pearlman, who will be bringing his unique brand of showmanship to Normandy Farm Hotel and Conference Center, 1401 Morris Road, Blue Bell, on April 12 to raise funds for Habitat for Humanity of Montgomery and Delaware Counties, mentalism is "magic of the mind - wholesome entertainment appropriate for ages 9 through 99" that amazes audiences based on nothing more than the "uncharted potential of the human mind," as explained Pearlman's website, www.