" Rule #1: You may bring only what fits in your backpack. Don’t try to fake it with a purse or a carry-on. Rule #2: You may not bring guidebooks, phrase books, or any kind of foreign language aid. And no journals. Rule #3: You cannot bring extra money or credit/debit cards, travelers’ checks, etc. I’ll take care of all that. Rule #4: No electronic crutches. This means no laptop, no cell phone, no music, and no camera. You can’t call home or communicate with people in the U.S. by Internet or telephone. Postcards and letters are acceptable and encouraged. That’s all you need to know for now. "