Simplify the following text for a Grade 5 native English-speaking person.
Original: Today there are thousands of Cayce students and more than 300 books written about Edgar Cayce . Members of Cayce 's organization , the Association for Research and Enlightenment ( A.R.E. ) exist worldwide and Edgar Cayce Centers are found in more than 35 countries .
Simplified: Cayce said yes and the entertainer tried to cure Cayce in front of an audience .